SOLUTION: 34.) Rebecca has 38 ounces of a 55% boric acid solution, which she wants to dilute to a 38% solution. How much water should she add to the boric acid?

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Question 804873: 34.) Rebecca has 38 ounces of a 55% boric acid solution, which she wants to dilute to a 38% solution. How much water should she add to the boric acid?

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +w+ = ounces of water to be added
+.55%2A38+=+20.9+ ounces of boric acid
in 55% solution
----------------
+20.9+%2F+%28+38+%2B+w+%29+=+.38+
+20.9+=+.38%2A%28+38+%2B+w+%29+
+20.9+=+14.44+%2B+.38w+
+.38w+=+6.46+
+w+=+17+
17 ounces of water should be added
check:
+20.9+%2F+%28+38+%2B+17+%29+=+.38+
+20.9+%2F+55+=+.38+
+20.9+=+.38%2A55+
+20.9+=+20.9+
OK