Key Takeaways: Base Definition
- A base is a substance that reacts with an acid in an acid-base reaction.
- The mechanism through which a base works has been argued throughout history. ...
- Examples of bases include hydroxides and soap.
Full Answer
What is the difference between 'bases' and 'basis'?
Examples of basis in a sentence
- I’d pretty much covered all the (basis/bases).
- Her twin brother felt confused on a regular (basis/bases).
- No one understands what I struggle with on a daily (basis/bases).
What does the word base mean?
Used as a derogatory term for Jewish people, "Y**" is commonplace at Tottenham games in chants by Spurs fans who use the term as a badge of honour. However, the Y-word is considered anti-Semitic in today's society. Why do Tottenham fans use the Y-word?
What are the bases in chemistry?
- LiOH - lithium hydroxide
- NaOH - sodium hydroxide
- KOH - potassium hydroxide
- RbOH - rubidium hydroxide
- CsOH - cesium hydroxide
- *Ca (OH) 2 - calcium hydroxide
- *Sr (OH) 2 - strontium hydroxide
- *Ba (OH) 2 - barium hydroxide
What is another word for "on the basis of"?
Synonyms for on the basis of include based on, as stated by, according to, as attested by, as claimed by, as per, as reported by, accordant with, as said by and as stated in. Find more similar words at wordhippo.com!
What are bases mean?
1 : a thing or a part on which something rests : bottom, foundation the base of a statue the base of the mountain. 2 : a starting place or goal in various games. 3 : any of the four stations a runner in baseball must touch in order to score.
What are bases in science?
A base is a substance that can neutralize the acid by reacting with hydrogen ions. Most bases are minerals that react with acids to form water and salts. Bases include the oxides, hydroxides and carbonates of metals. The soluble bases are called alkalis. Sodium hydroxide is an alkali.
What is the difference between basis and bases?
Basis means a starting point, base or foundation for an argument or hypothesis when used as a noun. Bases means foundations or starting points, checkpoints when used as a noun. A good way to remember the difference is Bases is the plural of base. Out of the two words, 'basis' is the most common.
What are 5 examples of bases?
14.3: Bases: Properties and ExamplesBases.Sodium Hydroxide.Potassium Hydroxide.Magnesium Hydroxide.Calcium Hydroxide.Ammonia.Contributions & Attributions.
What is base in biology?
In nucleic acid chemistry, one of the nitrogenous compounds, i.e. purines and pyrimidines, that are incorporated into nucleosides, nucleotides and nucleic acids. The most common bases are adenine, cytosine, guanine, thymine and uracil, abbreviated as A, C, G, T and U respectively.
What is a base in chemistry simple?
A base is a substance that can react with acids and neutralise them. Bases are usually: metal oxides, such as copper oxide. metal hydroxides, such as sodium hydroxide, or. metal carbonates, such as calcium carbonate.
Is bases plural of basis?
Bases is the plural of basis.
How do you use the word basis?
the most important or necessary part of something.This document will form the basis for our discussion.On a first-come, first-served basis.He only holds the post on an interim basis.They are now living together on a permanent basis.Their claim had no basis in fact .Salary levels are reviewed on a yearly basis.More items...•
What does covering all my bases mean?
(US cover the bases) to do everything necessary to be sure that something is successful: I think I've covered all the bases – I called everyone, ordered the food , and bought some decorations.
What are 10 common bases?
Names of 10 Basesof 10. Acetone. This is the chemical structure of acetone. ... of 10. Ammonia. This is the ball and stick model of the ammonia molecule. ... of 10. Calcium Hydroxide. ... of 10. Lithium Hydroxide. ... of 10. Methylamine. ... of 10. Potassium Hydroxide. ... of 10. Pyridine. ... of 10. Rubidium Hydroxide.More items...•
What are 10 common household bases?
>>What are 10 common household bases?...Sodium Bicarbonate - Baking Soda.Soap (A mild base)Oven Cleaner.Drain Cleaner.Toothpaste.Bleach.Ammonia (Sometime found in hair products or cleaning products)Washing Powder.More items...
What are the 3 types of base?
In chemistry, there are three definitions in common use of the word base, known as Arrhenius bases, Brønsted bases, and Lewis bases. All definitions agree that bases are substances which react with acids as originally proposed by G.
What does basis mean in English?
English Language Learners Definition of basis. : something (such as an idea or set of ideas) from which another thing develops or can develop. : a reason for doing something. : a fixed pattern or system for doing something. See the full definition for basis in the English Language Learners Dictionary.
What is accrual basis?
2 : a basic principle or method especially : the principle or method by which taxable income is calculated. Note: The Internal Revenue Code has set some limits on which method a taxpayer may use for figuring taxable income. For example, a corporation with gross receipts under $5,000,000 may be a cash-basis taxpayer. — accrual basis.
What is the definition of jelly?
1 : the bottom of something considered as its foundation. 2 : the principal component of something Fruit juice constitutes the basis of jelly.
What does "base" mean in math?
2. anything upon which something is based; a fundamental principle. 3. the principal constituent; fundamental ingredient. 4. a basic fact, amount, standard, etc., used in making computations, reaching conclusions, or the like: to be paid on an hourly basis; to be chosen on the basis of merit. syn: See base 1.
What is the plural of "base"?
bases. plural of base and of basis: All the bases are covered. Not to be confused with: basis – the principal constituent; a basic fact, amount, standard, etc., used in reaching conclusions; groundwork: This is the basis for our decision.
What is a base in chemistry?
Updated May 06, 2019. In chemistry, a base is a chemical species that donates electrons, accepts protons, or releases hydroxide (OH-) ions in aqueous solution. Bases display certain characteristic properties that can be used to help identify them.
How does a base work?
Generally, a base either accepts a proton, releases a hydroxide anion when dissolved in water, or donates an electron. Examples of bases include hydroxides and soap.
Why can't superbases remain in aqueous solution?
A superbase cannot remain in aqueous solution because it is a stronger base than the hydroxide ion. An example of a superbase in sodium hydride (NaH).
What color does a base react with?
They react vigorously with acids and organic matter. Bases react in predictable ways with pH indicators. A base turns litmus paper blue, methyl orange yellow, and phenolphthalein pink. Bromothymol blue remains blue in the presence of a base.
What is a strong base?
A strong base completely dissociates into its ions in water or is a compound that can remove a proton (H +) from a very weak acid. Examples of strong bases include sodium hydroxide (NaOH) and potassium hydroxide (KOH). A weak base incompletely dissociates in water.
How do acid and base react?
An acid and a base react with each other in a neutralization reaction. In neutralization, an aqueous acid and aqueous base produce an aqueous solution of salt and water. If the salt is saturated or insoluble, then it may precipitate out of the solution.
What is a neutral base?
A neutral base is one which forms a bond with a neutral acid such that the acid and base share an electron pair from the base. A solid base is active in solid form. Examples include silicon dioxide (SiO 2) and NaOH mounted on alumina. Solid bases may be used in anion exchange resins or for reactions with gaseous acids.
What is a base in chemistry?
Base, in chemistry, any substance that in water solution is slippery to the touch, tastes bitter, changes the colour of indicators ( e.g., turns red litmus paper blue), reacts with acids to form salts, and promotes certain chemical reactions (base catalysis). Examples of bases are the hydroxides of the alkali and alkaline earth metals ( sodium, ...
What are some examples of bases?
Examples of bases are the hydroxides of the alkali and alkaline earth metals ( sodium, calcium, etc.) and the water solutions of ammonia or its organic derivatives ( amines ). Such substances produce hydroxide ions (OH -) in water solutions ( see Arrhenius theory ). alkaline testing.
What is the basic concept of acid and base?
Broader definitions of a base, to include substances that exhibit typical basic behaviour as pure compounds or when dissolved in solvents other than water, are given by the Brønsted-Lowry theory and the Lewis theory.
What is the reaction between acid and base?
acid–base reaction. Base s are chemical compounds that, in solution, are soapy to the touch and turn red vegetable dyes blue. When mixed, acids and bases neutralize one another and produce salts, substances with a salty taste and none of the characteristic properties of either acids or bases.…. Arrhenius theory.
Types of Bases
Acidity, concentration, and degree of ionisation are three variables that can be used to classify bases.
Properties of Bases
A hydroxide ion (OH–) is released into water by bases. The stronger the base becomes as more ions are released.
Uses of Bases
Sodium hydroxide is used in the manufacture of soap and paper. The sodium hydroxide (NaOH) is also utilised in the production of rayon.
Sample Problems
At home, we employ bases as cleaning agents and antacids. Soaps, lye (which is used in oven cleansers), magnesia milk, and Tums are all examples of popular homemade bases. Each of them has a pH greater than seven, can consume free hydrogen, and neutralise acids.
What does "base" mean in math?
2. anything upon which something is based; a fundamental principle. 3. the principal constituent; fundamental ingredient. 4. a basic fact, amount, standard, etc., used in making computations, reaching conclusions, or the like: to be paid on an hourly basis; to be chosen on the basis of merit. syn: See base 1.
What does "basis" mean?
ba·sis. (bā′sĭs) n. pl. ba·ses (-sēz′) 1. A fact or circumstance on which something is established: rumors with no basis in reality. See Synonyms at base 1. 2. The chief constituent; the fundamental ingredient: The basis for most liquids is water. 3.
What is the basis of a decision?
basis. the principal constituent; a basic fact, amount, standard, etc., used in reaching conclusions; groundwork: This is the basis for our decision. bases – plural of base and of basis: All the bases are covered.
What does archaic mean?
Archaic A physical base on which something rests. [Middle English, foundation upon which something rests, base, from Latin, from Greek, a stepping, that on which one stands, base; see g w ā- in Indo-European roots .] American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing ...
What is a strong base?
A strong base can be defined as a chemical compound that has the capacity to remove a proton from a molecule of even a very weak acid in an acid-base reaction. A strong base is that which has the ability to completely dissociate in an aqueous solution to yield one or more hydroxide ions per molecule of the base. A strong base reacts with strong acid to form stable compounds.
What is the Lewis definition of base?
Lewis definition of base in chemistry defines base as a molecule with a high-energy pair of electrons that can donate a pair of nonbonding electrons to the acids that accept it and form an adduct.
What is the Arrhenius base?
Arrhenius base definition, chemistry defines base as a substance that gets dissociated in an aqueous solution to form hydroxide ions OH￣. These hydroxide ions react with hydrogen ions to form water in an acid-base solution.
What are the three bases?
The word base has three different definitions in chemistry, and they are Arrhenius base, Bronsted base, and Lewis base. All the base definitions agree to the fact that bases react with acids.
What is a bronsted base?
Bronsted base definition, chemistry defines base as a substance that can accept the hydrogen cations or protons. According to Bronsted, these substances that accept cations do not contain hydroxide ions, but they still react with water in order to increase the number of hydroxide ions.
What is a weak base?
A weak base can be defined as a chemical compound that does not fully dissociate in an aqueous solution , or it can be said that the protonation in a weak base is always incomplete. When a weak base is added to an aqueous solution, it does not ionise entirely as a result of which the aqueous solution still contains a large number of undissociated molecules of the base. Now below, we will list some weak base examples.
What is the basic work of alkalis?
All alkalis are bases, but all bases are not alkalis, only the bases that dissolve in water are known as alkalis. The main work of a base is to neutralize an acid, but an alkali not only neutralizes the acids, but it also produces hydroxide ions. Alkalis are usually called the subset of bases. Bases never completely dissolve in water, but alkalis completely dissociate in water to produce hydroxide ions OH⁻.
Word Origin
- The word "base" came into use in 1717 by French chemist Louis Lémery. Lémery used the word as a synonym for Paracelsus' alchemical concept of a "matrix" in alchemy. Paracelsus proposed natural salts grew as a result of a universal acid mixing with a matrix. While Lémery may have used the word "base" first, its modern usage is generally attributed to French chemist Guillaume …
Properties of A Base
- A base displays several characteristic properties: 1. Aqueous base solution or molten bases dissociate into ions and conduct electricity. 2. Strong basesand concentrated bases are caustic. They react vigorously with acids and organic matter. 3. Bases react in predictable ways with pH indicators. A base turns litmus paper blue, methyl orange yellow, and phenolphthalein pink. Bro…
Types of Bases
- Bases may be categorized according to their degree of dissociation in water and reactivity. 1. A strong base completely dissociates into its ions in water or is a compound that can remove a proton (H+) from a very weak acid. Examples of strong bases include sodium hydroxide (NaOH) and potassium hydroxide (KOH). 2. A weak base incompletely dissociat...
Reaction Between An Acid and A Base
- An acid and a base react with each other in a neutralization reaction. In neutralization, an aqueous acid and aqueous base produce an aqueous solution of salt and water. If the salt is saturated or insoluble, then it may precipitateout of the solution. While it may seem like acids and bases are opposites, some species can act as either an acid or a base. In fact, some strong acids can act …
Sources
- Jensen, William B. (2006). "The origin of the term "base". The Journal of Chemical Education. 83 (8): 1130. doi:10.1021/ed083p1130
- Johll, Matthew E. (2009). Investigating chemistry: a forensic science perspective(2nd ed.). New York: W. H. Freeman and Co. ISBN 1429209895.
- Whitten, Kenneth W.; Peck, Larry; Davis, Raymond E.; Lockwood, Lisa; Stanley, George G. (200…
- Jensen, William B. (2006). "The origin of the term "base". The Journal of Chemical Education. 83 (8): 1130. doi:10.1021/ed083p1130
- Johll, Matthew E. (2009). Investigating chemistry: a forensic science perspective(2nd ed.). New York: W. H. Freeman and Co. ISBN 1429209895.
- Whitten, Kenneth W.; Peck, Larry; Davis, Raymond E.; Lockwood, Lisa; Stanley, George G. (2009). Chemistry(9th ed.). ISBN 0-495-39163-8.
- Zumdahl, Steven; DeCoste, Donald (2013). Chemical Principles(7th ed.). Mary Finch.
