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प्रश्न
Answer the following in brief :
What are acids and bases according to Arrhenius theory?
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उत्तर
According to Arrhenius theory, acids and bases are defined as follows:
i. Acid: An acid is a substance that contains hydrogen and gives H+ ions in an aqueous solution.
e.g.
\[\ce{HCl_{(aq)} ->[water]H^+_{ (aq)} + Cl^-_{ (aq)}}\];
\[\ce{CH3COOH_{(aq)}⇌[water] H^+_{ (aq)} + CH3COO^-_{ (aq)}}\]
ii. Base: A base is a substance that contains the OH group and produces hydroxide ions (`"OH"^-` ions) in aqueous solution.
e.g.
\[\ce{NaOH_{(aq)}->[water]Na^+_{ (aq)} + OH^-_{ (aq)}}\];
\[\ce{NH4OH_{(aq)} ⇌[water] NH^+_{ 4(aq)} + OH^-_{ (aq)}}\]
संबंधित प्रश्न
Answer the following in one sentence :
Why cations are Lewis acids?
Label the conjugate acid-base pair in the following reaction:
\[\ce{HCl + H2O ⇌ H3O\overset{\oplus} + Cl\overset{\ominus}{}}\]
Label the conjugate acid-base pair in the following reaction:
\[\ce{CO^2-_3 + H2O ⇌ OH- + HCO^-_3}\]
Answer the following in brief :
Write a reaction in which water acts as a base.
The theory which explain amphoteric nature of water is ______.
Label the one conjugate acid-base pair in the following reaction.
\[\ce{CO^{2-}_{3(aq)} + H2O_{(l)} ⇌ OH^- + HCO^-_3}\]
Classify the following species into Lewis acids and Lewis bases.
| Cl- | |
| `"NH"_4^+` | |
| BCl3 | |
| NH3 |
Explain the amphoteric nature of water.
The conjugate acid of \[\ce{HSO^-_4}\] is ____________.
In which oxidation state, group 15 elements act as Lewis base?
Conjugate base for Bronsted acids H2O and HF are ___________.
Which of the following fluro compounds is most likely to behave as a Lewis base?
Which of these is not likely to act as Lewis base?
Which of the following can act as Lowry – Bronsted acid as well as base?
When aqueous ammonia is added to CuSO4 solution, the solution turns deep blue due to the formation of tetramminecopper (II) complex, \[\ce{[Cu(H2O)6]^{2+}_{( aq)} + 4NH3_{( aq)} ⇌ [Cu(NH3)4]^{2+}_{( aq)}}\], among HO2 and NH3 Which is stronger Lewis base.
Name one amphoteric solvent.
Identify the conjugate acid - base pair in the following reaction.
\[\ce{H2O + HCl -> H3O+ + Cl-}\]
Which of the following species is amphoteric in nature?
What are the limitations of Arrhenium theory?
According to Lowry-Bronsted concept, base is a substance which acts as ______.
Calculate pH of 0.01 M NaOH.
Vinegar contains ______ acid.
Identify the conjugate acid-base pairs in the reaction,
\[\ce{CH3COOH(aq) + NH3(aq) <=> NH^+_4(aq) + CH3COO^-(aq)}\]
