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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

The solubility of ammonium formate, NH4CHO2, in 100. g of water is 102 g at 0 °C and 546 g at 80 °C. A solution is prepared by dissolving NH4CHO2 in 200. g of water until no more will dissolve at 80 °C. The solution is then cooled to 0 °C. What mass of NH4CHO2 precipitates? (Assume that no water evaporates and that the solution is not supersaturated.)

Interpretation Introduction

Interpretation: The mass of ammonium formate precipitated in 200g of water 800C is to be determined.

Concept introduction:

Solubility: The maximum quantity of a solute which can be dissolved at a particular amount of solvent in a certain temperature.

As the temperature increases, solubility increases.

Explanation

At 800C, 546g of ammonium formate gets dissolved in 100g of water. So at the same temperature, it dissolves twice the amount (1092g) of ammonium formate in 200g of water. Also at 00C, 102g of ammonium formate gets dissolved in 100g of water

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