SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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50 cm3
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200 cm3
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500 cm3
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2 000 cm3
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Detailed explanation-1: -Therefore, 5.6 dm³ of distilled water needs to be used to dissolve 0.4 mol dm³ of potassium chloride.
Detailed explanation-2: -The molar mass of KCl is 74.55 g/mol. Hence, the amount of water that should be added to 5.0 grams of KCl to prepare a 0.500 m solution is 0.13 kg.
Detailed explanation-3: -Concentration in ppm =0.025100.025×106=250 ppm.
Detailed explanation-4: -How much water would I need to add to 500 mL of a 2.4 M KCl solution to make a 1.0 M solution? 1200 mL will be the final volume of the solution. However, since there’s already 500 mL of solution present, you only need to add 700 mL of water to get 1200 mL as your final volume. The answer: 700 mL.
Detailed explanation-5: -Molarity = massofsolvent(inkg)moles= 100×10−30. 1=1m.