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2.1 Purity and separating mixtures

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Question 5

A student writes this equation for the reaction between magnesium hydroxide and hydrochloric acid:

Mg(OH)2+HCl→MgCl2+H2O\mathrm{Mg(OH)_{2} + HCl \rightarrow MgCl_{2} + H_{2}O}Mg(OH)2​+HCl→MgCl2​+H2​O

Relative atomic mass (ArA_rAr​): Mg = 24.3, O = 16.0, H = 1.0, Cl = 35.5

Calculate the total relative mass of the reactants and the total relative mass of the products in the student's equation. Use your answers to explain whether the equation is balanced.

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2.1 Purity and separating mixtures Questions

  1. GCSE
  2. /Chemistry
  3. /2.1 Purity and separating mixtures

102 exam-style questions on OCR GCSE Chemistry 2.1 Purity and separating mixtures, covering 2.1.1 Pure substances and melting point data, 2.1.2 Relative formula mass and empirical formula, 2.1.3 Formulations as useful mixtures, 2.1.4 Techniques for separating mixtures, and 2.1.5 Chromatography and Rf values. Each one has a worked solution and a mark scheme showing where the marks go.

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