This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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You're on a roll — hapa kuna majibu ya maswali yako: a) I) Step 1: Determine which salt's concentration exceeds its solubility limit at 20 °C. For Salt K: Amount present = 28 g Solubility at 20 °C = 31 g Since 28 g < 31 g, Salt K will remain dissolved. For Salt L: Amount present = 17.5 g Solubility at 20 °C = 8 g Since 17.5 g > 8 g, Salt L will crystallize. Salt that crystallizes: L II) Step 2: Calculate the mass of Salt L that crystallizes. Mass of Salt L initially present = 17.5 g Maximum mass of Salt L that can remain dissolved at 20 °C = 8 g Mass of Salt L that crystallizes = (Mass initially present) - (Mass that remains dissolved) Mass crystallized = 17.5 g - 8 g Mass crystallized = 9.5 g Mass of the salt that crystallizes: 9.5 g b) i) Step 1: Define hard water. Hard water is water that contains a high concentration of dissolved mineral ions, primarily calcium (Ca^2+) and magnesium (Mg^2+) ions. It does not readily form lather with soap. What is hard water: Water that contains high concentrations of dissolved mineral ions, mainly calcium and magnesium ions, and does not easily form lather with soap. ii) Step 2: State one use of hard water. Hard water can be used in certain industrial processes or for drinking as it provides essential minerals. One use of hard water: Used for brewing beer. That's 4 down, 1 left today. What's next?