Question
What is the effect of dilution on an acid or base?
✓
Answer
Adding water to an acid or base will change its pH. Water is mostly water molecules so adding water to an acid or base reduces the concentration of ions in the solution.
When an acidic solution is diluted with water the concentration of H+ ions decreases and the pH of the solution increases towards 7.
To make the pH change by 1, a tenfold dilution is required.
When an acidic solution is diluted with water the concentration of H+ ions decreases and the pH of the solution increases towards 7.
To make the pH change by 1, a tenfold dilution is required.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Hydrochloric acid reacts with a metal X to form a gas Y which bums with a ‘pop’ sound. Sodium hydroxide solution also reacts with the same metal X (on heating) to form the same gas Y.
- Name X and Y.
- Write the chemical equation of the reaction of metal X with.
- Hydrochloric acid, and
- Sodium hydroxide solution.
On adding dilute hydrochloric acid to copper oxide powder, the solution formed is blue-green.
- Predict the new compound formed which imparts a blue-green colour to solution.
- Write a balanced chemical equation of the reaction which takes place.
- On the basis of the above reaction, what can you say about the nature of copper oxide?
Intake of small quantity of methanol can be lethal. Comment.
i. Define covalent bond. Explain with the help of examples.
ii. Discuss the important characteristics of covalent compounds.
ii. Discuss the important characteristics of covalent compounds.
Give names of the following:
- An alcohol containing 5-carbon atoms.
- On acid with 4-carbon atoms.
- Simplest aldehyde.
A cleaned aluminium foil was placed in an aqueous solution of zinc sulphate. When the aluminium foil was taken out of the zinc sulphate solution after 15 minutes, its surface was found to be coated with a silvery grey deposit. From the given observation, what can be concluded?
What is an oxidising agent? What happens when an oxidising agent is added to propanol? Explain with the help of a chemical equation.
What do you mean by a precipitation reaction? Explain giving an example.
List two tests for experimentally distinguishing between an alcohol and a carboxylic acid and describe how these tests are performed.