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Review: Ratio of Substances in a Solution
Explanation
In this question, we have a three-part ratio, so we can
keep track of it with the colon notation or a table:
The second row is the desired ratio. First we put in a 10
to double the ratio of sugar to salt. Then, to keep the ratio of sugar to water
the same, we have to double the water also. Then we learn that the actual value
of water is 7, or half the entry in the row, so the actual value for salt will
be half its entry, or 1.5.
The correct answer is (A).
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