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Worked example 4 On heating, potassium chlorate( composes into potassium chloride and oxygen: 2KCIO,(s) → 2KCI(s) + 30,(g) 9.8 g of KCIO;(s) are heated. Calculate: a the mass of KCl(s) formed;

Worked example 4 On heating, potassium chlorate( composes into potassium chloride and oxygen: 2KCIO,(s) → 2KCI(s) + 30,(g) 9.8 g of KCIO;(s) are heated. Calculate: a the mass of KCl(s) formed;

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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To WUIK Out reactant. Use the relationship: mass of substance number of moles = mass of 1 mol of substance or volume of gas at s.t.p. number of moles of gas = 22.4 dm3 mol-1 of moles of the unknown, and hence the mass or volume at s.t.p. Worked example 4 On heating, potassium chlorate( omposes into potassium chloride and oxygen: 2KCIO;(s) → 2KCI(s) + 30,(g) 9.8 g of KCIO3(s) are heated. Calculate: a the mass of KCl(s) formed3B b the mass and volume, at s.t.p., of O,(g) formed.
Transcribed Image Text:To WUIK Out reactant. Use the relationship: mass of substance number of moles = mass of 1 mol of substance or volume of gas at s.t.p. number of moles of gas = 22.4 dm3 mol-1 of moles of the unknown, and hence the mass or volume at s.t.p. Worked example 4 On heating, potassium chlorate( omposes into potassium chloride and oxygen: 2KCIO;(s) → 2KCI(s) + 30,(g) 9.8 g of KCIO3(s) are heated. Calculate: a the mass of KCl(s) formed3B b the mass and volume, at s.t.p., of O,(g) formed.
Worked example 7 Barium chloride reacts with magnesium sulphate to form barium sulphate and magnesium chloride: BaCl,(aq) + M9SO,(aq) → BaSO,(s) + MgCl,(aq) 50 cm³ of 0.2 mol dm-3 BaCl,(aq) reacted according to the above equation. Calculate: the volume, in cm³, of 0.4 mol dm-3 MgSO,(aq) needed; a b the mass of BaSO,(s) formed.
Transcribed Image Text:Worked example 7 Barium chloride reacts with magnesium sulphate to form barium sulphate and magnesium chloride: BaCl,(aq) + M9SO,(aq) → BaSO,(s) + MgCl,(aq) 50 cm³ of 0.2 mol dm-3 BaCl,(aq) reacted according to the above equation. Calculate: the volume, in cm³, of 0.4 mol dm-3 MgSO,(aq) needed; a b the mass of BaSO,(s) formed.
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