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3.3 Types of chemical reactions

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Question 38

A student writes symbol equations for the reactions of:

  • calcium hydroxide with nitric acid
  • potassium carbonate with nitric acid
  • magnesium oxide with hydrochloric acid
  • zinc with hydrochloric acid.

Which equation is correct and balanced?

[1]
A

2MgO+2HCl→MgCl2+H2O\mathrm{2MgO + 2HCl \rightarrow MgCl_2 + H_2O}2MgO+2HCl→MgCl2​+H2​O

B

Zn+2HCl→ZnCl2+H2O\mathrm{Zn + 2HCl \rightarrow ZnCl_2 + H_2O}Zn+2HCl→ZnCl2​+H2​O

C

Ca(OH)2+2HNO3→Ca(NO3)2+2H2O\mathrm{Ca(OH)_2 + 2HNO_3 \rightarrow Ca(NO_3)_2 + 2H_2O}Ca(OH)2​+2HNO3​→Ca(NO3​)2​+2H2​O

D

K2CO3+2HNO3→KNO3+H2O+CO2\mathrm{K_2CO_3 + 2HNO_3 \rightarrow KNO_3 + H_2O + CO_2}K2​CO3​+2HNO3​→KNO3​+H2​O+CO2​

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3.3 Types of chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /3.3 Types of chemical reactions

112 exam-style questions on OCR GCSE Chemistry 3.3 Types of chemical reactions, covering 3.3.1 Oxidation and reduction in terms of oxygen, 3.3.2 Acids, alkalis and neutralisation, 3.3.3 The pH scale and measuring pH, 3.3.4 Oxidation and reduction in terms of electrons, 3.3.5 Dilute and concentrated, weak and strong acids, and 3.3.6 Hydrogen ion concentration and pH. Each one has a worked solution and a mark scheme showing where the marks go.

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