Homework Ph Chemistry Worksheet (Page 5 of 6) in pdf

Homework Ph Chemistry Worksheet Page 5

Homework 4

Q1. Class 2C made some statements about the effect of adding water to an

alkaline

solution.

The pH of the solution will rise.

The pH of the solution will fall towards 7.

The solution will become more dilute.

Adding water will have no effect on the solution.

a) Identify the 2 correct statements.

b) Copy and complete the following sentences by choosing the correct words:

falls/rises

i) When an acidic solution is diluted with water, the pH

and the

increases/decreases.

acidity

falls/rises

ii) When an alkaline solution is diluted with water, the pH

and the

increases/decreases

alkalinity

Q2a) Apart from water, what is formed when an acid reacts with an alkali?

b) Name the type of reaction when an acid reacts with an alkali.

c) What happens to the pH of an acid when an alkali is added?

d) What happens to the pH of an alkali when an acid is added?

Q3a) Explain why vinegar is added to wasp stings to soothe the pain.

b) Explain why farmers add lime to soil which is too acidic.

Homework Ph Chemistry Worksheet Page 5