Question

question 1 (1 point)
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how would you prepare a 15% sugar solution?

1. 1500 mg sugar in 10 ml of water
2. 15 g sugar in 100 ml of water
3. 15000 mg sugar in 100 ml of water
4. 7.5 g sugar in 50 ml of water
5. all of the above
6. none of the above

Explanation:

Step1: Recall mass - volume percentage formula

Mass - volume percentage ($m/v\%$) = $\frac{\text{mass of solute (g)}}{\text{volume of solution (ml)}}\times100$. Assume the density of water is 1 g/ml and the volume of the solution is approximately equal to the volume of water for dilute solutions.

Step2: Analyze option 1

1500 mg = 1.5 g. Mass - volume percentage = $\frac{1.5}{10}\times100 = 15\%$.

Step3: Analyze option 2

Mass - volume percentage = $\frac{15}{100}\times100=15\%$.

Step4: Analyze option 3

15000 mg = 15 g. Mass - volume percentage = $\frac{15}{100}\times100 = 15\%$.

Step5: Analyze option 4

Mass - volume percentage = $\frac{7.5}{50}\times100=15\%$.

Answer:

1. All of the above