Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
What is the new freezing point of a solution containing 22.5 g NaCl in 375.0 mL of water? (1 mol NaCl = 58.44 g, Kf for water = 1.86°C/m)?
1 Answer
Relevance
- Roger the MoleLv 72 months agoFavorite Answer
Supposing complete ionization:
NaCl → Na{+} + Cl{-} [two ions total]
(22.5 g NaCl) / (58.44 g NaCl/mol) x (2 mol ions / 1 mol NaCl) / (0.3750 kg) =
2.0534 mol ions / kg
(1.86°C/m) x (2.0534 m) = 3.8193°C change
0°C - 3.8193°C = - 3.82°C
Still have questions? Get your answers by asking now.