Question 6 : Solutions-%(w/v)?
The density of a solution of 4.21g KI in 27.10g H2O is 1.12g/mL. Calculate the % w/v of KI in the solution.
12.8 % (w/v)
19.1 % (w/v)
15.1 % (w/v)
20.0 % (w/v)
17.4 % (w/v)
13.6 % (w/v)
Answer:
Total mass of KI = 4.21 g
Total mass of solution = 4.21 + 27.10 = 31.31 g
Total volume of solution = (31.31 g) x (1 mL / 1.12 g) = 27.96 mL
weight of KI divided by volume of solution:
(4.21 g) / (27.96 mL) x 100% = 15.1%(w/v)
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12.8 % (w/v)
19.1 % (w/v)
15.1 % (w/v)
20.0 % (w/v)
17.4 % (w/v)
13.6 % (w/v)
Answer:
Total mass of KI = 4.21 g
Total mass of solution = 4.21 + 27.10 = 31.31 g
Total volume of solution = (31.31 g) x (1 mL / 1.12 g) = 27.96 mL
weight of KI divided by volume of solution:
(4.21 g) / (27.96 mL) x 100% = 15.1%(w/v)
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