SOLUTION: we have 1000 ml 30% of NaCl. we must prepare 45% of solution. How many grams of water we needed?

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Question 810010: we have 1000 ml 30% of NaCl. we must prepare 45% of solution. How many grams of water we needed?
Answer by Alan3354(69443) About Me  (Show Source):
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we have 1000 ml 30% of NaCl. we must prepare 45% of solution. How many grams of water we needed?
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Adding water will decrease the concentration, not increase it.