A science teacher has a supply of 50% sugar solution and a supply of 80% sugar solution. How much of each solution should the te acher mix together to get 105 ML of 60% sugar solution for an experiment 70 ML of the 50% solution and 35 ML of the 80% solution
35 ML of the 50% solution and 70 ML of the 80% solution
70 ML of the 50% solution and 70 ML of the 80% solution
35 ML of the 50% solution and 35 ML of the 80% solution
1 answer:
You can establish a system of two equation with two variables. Varibles are: V1 = volume of the 50% sugar solution V2 = volumen of the 80% sugar solution Equations: Balance of sugar: Sugar from 50% solution: 0.5*V1 Sugar from 80% solution: 0.8*V2 Sugar in the final solution (mix): 0.6 * 105 = 63 1) 0.5V1 + 0.8V2 = 63 Final volume = volume of 50% solution + volume of 80% solution 2) V1 + V2 = 105 From (2) V1 = 105 - V2 Substitue in (1) 0.5 (105 - V2) + 0.8 V2 = 63 52.5 - 0.5V2 + 0.8V2 = 63 0.3 V2 = 63 - 52.5 0.3 V2 = 10.5 V2 = 10.5/0.3 V2 = 35mL V1 = 105 - 35 = 70 mL Answer: 70 mL of the 50% solution and 35 mL of the 80% solution.
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