Question 984097: Part A - A 28% w/v stock solution of NaCl is diluted with water according to a 1:8 ratio, and again with a 4:7 dilution ratio. Determine overall ratio.
I solved this as 1/14
Part B - If there is 84g of NaCl in the final diluted solution, determine the total amount of water added to the solution to perform the dilutions.
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! I agree, it is 1/14
If there are 84 grams with a 1:14 solution, it should be 2% of the whole amount, which is diluted to 4.2 liters, or 50 fold.
84 grams is 28% of a solution of 300 cc.
3.9 liters of water were added.
The first batch was 2100, to make it 1:8
The second batch was 1800, to reach 4200 cc or 4.2 liters.
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