Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 6 - Preparing Salts>End of Chapter Review>Q 14

EASY

Lower Secondary Stage 9

IMPORTANT

Earn 100

Jed is asked to write a balanced symbol equation for the reaction between calcium and oxygen to produce calcium oxide. This is his answer:

$Ca + O \to CaO$

The above equation is not correct. Write the correct balanced symbol equation.

Important Questions on Preparing Salts

EASY

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 6 - Preparing Salts>Exercise 1>Q 1

Copy and write in the missing symbols or formulae of the following symbol equation:

Calcium $+$ Sulphuric acid $\to$ Calcium sulphate $+$ Hydrogen

_____ $+$ $H_{2} {SO}_{4}$ $\to$ ${CaSO}_{4}$ $+$ _____.

MEDIUM

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 6 - Preparing Salts>Exercise 7>Q 3

When reacting a solid with an acid to make salt, evaporation is used. Explain why.

MEDIUM

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 6 - Preparing Salts>Exercise 10>Q 5

Rajesh plans to make pure crystals of potassium sulphate using a metal carbonate solution. Write a word equation of the reaction should use.

EASY

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 6 - Preparing Salts>End of Chapter Review>Q 1

Which of these equations are balanced?

a. $Mg + H_{2} {SO}_{4} \to {MgSO}_{4} + H_{2}$

b. $Na + HCl \to NaCl + H_{2}$

c. $Ca + HCl \to {CaCl}_{2} + H_{2}$

d. $2 Li + H_{2} {SO}_{4} \to {Li}_{2} {SO}_{4} + H_{2}$

EASY

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 6 - Preparing Salts>End of Chapter Review>Q 10

A chemist mixes a piece of calcium with some hydrochloric acid. Write a balanced symbol equation for the reaction.