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kloring3506
29.06.2019 •
Mathematics
Rajan needs 1 liter of 15% hydrochloric acid solution for an experiment. he checks his storage cabinet, but he only has a 5-liter bottle of 5% hydrochloric acid solution and a 1-liter bottle of 45% hydrochloric acid solution. how many liters of the 5% hydrochloric acid and the 45% hydrochloric acid solutions should rajan combine to make 1 liter of a solution that is 15% hydrochloric acid?
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Ответ:
Step-by-step explanation:
Let us assume that, x liters of the 5% hydrochloric acid and y liters of the 45% hydrochloric acid solutions are combined.
As Rajan need total of 1 liter of solution, so
i.e
--------------------1
As Rajan needs 5% hydrochloric acid and 45% hydrochloric acid to make a 1 liter batch of 15% hydrochloric acid, hence acid content of the mixture of two acids will be same as of the final one, so
i.e
-------------2
Putting value of x from equation 1 in equation 2,
Putting the value of y in equation 1,
Therefore, Rajan must use 0.75 liters of 5% hydrochloric acid solution and 0.25 liters of 45% hydrochloric acid solution.
Ответ:
6 : 7
Step-by-step explanation:
Given the ratio 3 : 3
( multiply both parts by 2 to clear the fraction )
= 6 : 7