Write the balanced symbol equations for the following reactions. Reaction between calcium and hydrochloric acid. Reaction between magnesium and sulphuric acid. Reaction between zinc and nitric acid. Reaction between zinc carbonate and sulphuric acid. Reaction between iron ( III ) carbonate and hydrochloric acid.

A balanced chemical equation or symbol equation should contain equal number of atoms on both the sides of the equation. Therefore, the given symbol equations can be balanced as, Reaction Balanced symbol equation Reaction between calcium and hydrochloric acid. Ca + 2 HCl → CaCl 2 + H 2 Reaction between magnesium and sulphuric acid. Mg + H 2 SO 4 → MgSO 4 + H 2 Reaction between zinc and nitric acid. Zn + 2 HNO 3 → Zn NO 3 2 + H 2 Reaction between zinc carbonate and sulphuric acid. ZnCO 3 + H 2 SO 4 → ZnSO 4 + H 2 O + CO 2 Reaction between iron III carbonate and hydrochloric acid. Fe 2 CO 3 3 + 6 HCl → 2 FeCl 3 + 3 H 2 O + 3 CO 2

E M B I B E

Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 6 - Preparing Salts>Exercise 4>Q 9

MEDIUM

Lower Secondary Stage 9

IMPORTANT

Earn 100

Write the word equation for the reaction between iron $(III)$ carbonate and hydrochloric acid.

Important Questions on Preparing Salts

MEDIUM

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 6 - Preparing Salts>Exercise 4>Q 10

Describe how you would test a gas to find out whether it was hydrogen.

HARD

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 6 - Preparing Salts>Exercise 4>Q 11

Erin adds same sized pieces of different metals to some hydrochloric acid. She notices that some fizz more quickly than others. Explain her results using your scientific knowledge and understanding.

MEDIUM

Lower Secondary Stage 9

IMPORTANT

Cambridge Lower Secondary Science Stage 9: Student's Book>Chapter 6 - Preparing Salts>Exercise 4>Q 12

Write the balanced symbol equations for the following reactions.