SOLUTION: You have 4L of an 90% aqueous solution of hydrochloric acid. You want 1L of a 25% solution. How much of the stock solution do you need to use?
Question 834596: You have 4L of an 90% aqueous solution of hydrochloric acid. You want 1L of a 25% solution. How much of the stock solution do you need to use? Found 2 solutions by Edwin McCravy, richwmiller:Answer by Edwin McCravy(20055) (Show Source):
You can put this solution on YOUR website! You have 4L of an 90% aqueous solution of hydrochloric acid. You want 1L of a 25% solution. How much of the stock solution do you need to use?
You are going to add water to the stock solution to make 1 liter.
Make this chart:
| | | Liters of
|Liters of| Percent | pure acid
| liquid | Acid | contained
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stock solution | x | 90%=0.90 | 0.90x
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water | 1-x | 0%=0.00 | 0.00(1-x)
===================================================
final solution | 1 | 25%=0.25 | 0.25(1)
Answer: ths of a liter of stock solution, and ths of a liter of water.
Edwin
