WorksheetsIsotope & Acid+Base
Total questions: 19
Worksheet time: 10mins
Four substances were tested for pH, lemon juice (pH 2), baking soda (pH 9), bleach (pH 12), and milk (pH 6). Which of the following correctly lists the substances from most basic to acidic?
lemon juice, milk, baking soda, bleach
bleach, baking soda, milk, lemon juice
milk, lemon juice, baking soda, bleach
baking soda, bleach, lemon juice, milk
What gas forms when an acid reacts with a metal?
O2
H2
H
CO2
Sodium carbonate + sulphuric acid ---> _______ + Carbon dioxide + Water
Sodium chloride
Copper sulphate
Sodium sulphate
sodium carbonate
Complete the word equation below:
Acid + alkali --> ............... + ................
Hint: alkali = base
salt + water
salt + hydrogen
carbon + dioxide
salt + carbon dioxide
Which organ in your body is very acidic?
Stomach
Blood
Liver
Kidneys
The Law of Conservation of Mass states
that matter exists in all states and reacts the same
that matter can only be changed into new substances by introducing a catalyst
that matter exists in the same state throughout any chemical change
that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants
The % of the parent isotope remaining after 1 Half Life.
50%
25%
12.5%
6.25%
The % of the parent isotope remaining after 2 Half Lives.
50%
25%
12.5%
6.25%
Mixing sugar and water
physical change
chemical change
Production of heat or light is evidence that a chemical change may have occurred.
True
False
Color change is evidence that a chemical change may have occurred.
True
False
A piece of metal is bent in half
physical change
chemical change
Chemical changes cannot be reversed by physical changes.
True
False
Water freezes to form ice
physical change
chemical change
Fizzing or foaming is evidence that a chemical change may have occurred.
True
False
