Question

A 15% (w/w) salt solution means

• A. 15 g of salt dissolved in 100 g of water
• B. 15 g of salt dissolved in 1000 g of water
• C. 15 g of salt dissolved in 85 g of water
• D. 15 g of salt dissolved in 95 g of water

Answer 1

The correct option is C 15 g of salt dissolved in 85 g of water

An x% (w/w) solution implies that x g of solute and (100 – x) g of solvent are present in a 100 g solution.
Therefore, 15% (w/w) salt solution means 15 g of salt is dissolved in 85 g of water.
Hence, the correct answer is option (c).