2006-06-20 03:38:09 · 12 answers · asked by crickwiz 2 in Science & Mathematics ➔ Chemistry
They have a pH between 7.1-14.0
They contain OH (hydroxide)
They are electrolytes (meaning they conduct electricity)
for example, KOH, NaOH, etc..
2006-06-21 15:49:09 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Base is the opposite of acid.
The common definition of a base is a chemical compound that absorbs hydronium ions when dissolved in water (a proton acceptor). An alkali is a special example of a base, where in an aqueous environment, hydroxide ions are donated. Bases and acids are seen as opposites because the effect of an acid is to increase the hydronium ion (H3O+) concentration in water, whereas bases reduce this concentration. Arrhenius bases are water-soluble and these solutions always have a pH greater than 7.
There are other more generalized and advanced definitions of acids and bases.
2006-06-20 10:42:44 · answer #2 · answered by whoselineguy 4 · 0⤊ 0⤋
Bases are substances which neutralizes the properties of acids.
They turn moist red litmus paper blue.Thier taste is bitter and touch is soapy.According to Arrhenius theory when added to water they dissolve and dissociates to give OH- ions.But gase like NH3 do not contain oh group still it is a base.
They have pH greater than 7.They are proton donor. They are also electron acceptor.NaOH,KOH,NH4OH,etc. are some examples of bases.
2006-06-20 11:25:13 · answer #3 · answered by bax 1 · 0⤊ 0⤋
A lewis base is an electron pair donor. A Bronsted - Lowry base is a proton acceptor.
2006-06-20 11:24:50 · answer #4 · answered by Darryl E 2 · 0⤊ 0⤋
Proton acceptors!
Substances with pH's higher than 7. Often times they have hydroxide groups on them, but sometimes they don't. The only thing that all bases have in common is that they will always accept protons, primarily from acids, which will always donate protons.
2006-06-20 10:42:08 · answer #5 · answered by Anonymous · 0⤊ 0⤋
Bases are oxides or hydroxides of metals[including ammonium hydroxide]They are proton acceptors.Bases are compounds that react with acids to give salt & water.They are chemically opposite in nature to acids and react with acids producing salts which are neutral.They have pH's higher than 7.Bases which are soluble in water are called alkalis.In contrast to acids,which are sour, bases are bitter in taste.Examples of bases:-
Insoluble bases:Magnesium oxide,Lead oxide.
Soluble bases-Alkalis-Potassium oxide,Sodium oxide
2006-06-20 11:11:58 · answer #6 · answered by Anonymous · 0⤊ 0⤋
There are several definitions, but the most broad is the Lewis definition. Bases are electron donors. Bronsted says they are proton acceptors.
2006-06-20 13:14:43 · answer #7 · answered by shiara_blade 6 · 0⤊ 0⤋
bases are on a field
2006-06-20 10:43:40 · answer #8 · answered by chelsie b 1 · 0⤊ 0⤋
opposite of acids.. they are defined to have pH above 7 (acids lower than seven) the molecule has a negative charge. (as someone said earlier, accepts protons)
2006-06-20 11:06:18 · answer #9 · answered by kasumi_is 1 · 0⤊ 0⤋
pH above 7
2006-06-20 10:57:37 · answer #10 · answered by dartmadscientist 2 · 0⤊ 0⤋