If 10 g salt is mixed with 90 g water, what is the mass percentage of salt in the solution?
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Answer and explanation
Correct answer: 10%
Mass percentage is calculated as (mass of solute ÷ total mass of solution) × 100. Assuming no material is lost, the total mass is 10 g + 90 g = 100 g. Therefore, salt percentage = (10 ÷ 100) × 100 = 10%. Option A is correct. The 90% value refers to water, while 11.1% uses an incorrect denominator and 100% ignores the water.
Frequently asked questions
What is the correct answer to this question?
10%
Why is this the correct answer?
Mass percentage is calculated as (mass of solute ÷ total mass of solution) × 100. Assuming no material is lost, the total mass is 10 g + 90 g = 100 g. Therefore, salt percentage = (10 ÷ 100) × 100 = 10%. Option A is correct. The 90% value refers to water, while 11.1% uses an incorrect denominator and 100% ignores the water.
Which subject and chapter does this question cover?
This is a Class 11 Chemistry question. Chapter: Chapter 01: Solutions.
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