1. Solve for the percent by mass of 4.5 g NaCl dissolved in 100 g solution.
Given:
Solution:
Mass of solute:
Mass of solution:
Given:
Solution:
Mass of solute:
Mass of solution:
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Answer:
Total mass: 100 + 4.5 = 104.5g
percent by mass: 4.5g / 104.5g x 100%
= 4.30622%
But if we will stick about 100g being the total mass,
percent by mass: 4.5g / 100g x 100%
= 4.5%
Explanation: