How many pints
Asked by maham237 @ in Chemistry viewed by 258 People
How many pints of a 30% sugar solution must be added to a 5 pint of a 5% sugar solution to obtain a 20% sugar solution?
Asked by maham237 @ in Chemistry viewed by 258 People
How many pints of a 30% sugar solution must be added to a 5 pint of a 5% sugar solution to obtain a 20% sugar solution?
Answered by maham237 @
You must add 7.5 pt of the 30 % sugar to the 5 % sugar to get a 20 % solution.
You can use a modified dilution formula to calculate the volume of 30 % sugar.
V_1×C_1 + V_2×C_2 = V_3×C_3
Let the volume of 30 % sugar = x pt. Then the volume of the final 20 % sugar = (5 + x ) pt
(x pt×30 % sugar) + (5 pt×5 % sugar) = (x + 5) pt × 20 % sugar
30x + 25 = 20x + 100
10x = 75
x = 75/10 = 7.5
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