1a) What are the properties of acids? b) Name some everyday products that contain acid.

2a) What is similar about the formula for hydrochloric acid and that for
sodium chloride?
b) What is different about these two formulae?

3) The illustration below shows a label on a jar of orange preserve.

Allergy advice: No nuts.
Suitable for vegetarians.
Ingredients: Sugar, oranges,
water, concentrated lemon
juice, sodium citrate, citric
acid, bitter orange oil.
Prepared with 30 g of fruit
per 100 g.

a) Which ingredient is a salt?
b) Find out why this ingredient is added to some
kinds of food.