ver the following questionis based solubility crve below Which salt is least sol
ID: 1032419 • Letter: V
Question
ver the following questionis based solubility crve below Which salt is least soluble Iin water 150 1. 140 130 120 2 How many grams of potassium chloride can be dissolved in 200 g 110 of water at 80° C? 100 90 0 O 70 60 e 50 At 40 C, how much potassium water? 4 Which salt shows the least change 30 20 10 n solubility from 0-100° C? 5 At 30° C, 90 g of sodium nitrate is 20 30 40 50 60 70 80 90 100 dissolved in 100 g of water. is this solution saturated, unsaturated or supersaturated? A saturated solution of potassium chlorate is formed from one hundred grams of water. If the saturated solution is cooled from 80 C to 50 C, how many grams of preciptate are formed? What compound shows a decrease in solublity from O to 100° C? Which salt is most soluble at 10° C? & 9 Which salt is least soluble at 50° C? Which salt is least soluble at 90° C?Explanation / Answer
ANSWER:
(1) KClO3 is the least soluble salt at 20oC.
(2) Solubility of KCl at 80oC is 50g/100 gm of H2O
Hence 200g of water will dissolve 100g of KCl
(3) 40 g of KNO3 can dissolved in 100g of water at 40oC (as per the curve given). Hence 300g of water will dissolve a meximum 120g of KNO3 at 40oC.
(4) NaCl shows the least change in solubility from 0oC to 100oC.
(5) It is a saturated solution.
(6) Solubility of potassium chlorate at 80oC and 50oC is 40g and 20g/100g of water respectivelly. Hence when the solution is cooled from 80oC to 50oC 20g of KClO3 will precepitate out
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