Register
What is the molality of a solution containing 15.0g NaCl dissolved in 50.0g water?
5.8k views
1 vote
What is the molality of a solution containing 15.0g NaCl dissolved in 50.0g water?

User Novice
by
6.8k points

2 Answers

2 votes

Answer:

C. 5.17

Step-by-step explanation:

User Thomaus
by
6.7k points
7 votes
Hey there!

Molar mass NaCl = 58.44 g/mol

number of moles:

n = m / mm

n = 15.0 / 58.44

n = 0.2566 moles of NaCl

Volume in Kg :

50.0 g / 1000 => 0.05 Kg

Therefore :

Molality = moles of solute / volume

Molatity = 0.2566 / 0.05

Molality = 5.132 mol/kg
User Einpoklum
by
6.5k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

7.1m questions

9.5m answers

Other Questions

As an object’s temperature increases, the ____________________ at which it radiates energy increases.
Key facts of covalent bonding
How many protons, electrons, and neutrons are in I- and Li+ ?
What functional groups are present in acetaminophen?
Which anion will form a precipitate with Ca2+
Link Copied!