A sample of 76 g of NaCl is dissolved to make 1 L of solution. What is the morality of the solution?
How do I get started solving this problem?
5 answers
I didn't know that solutions had morality. I wish everyone had morality.
Is this a sarcastic comment, Ms. Sue? Kinda weird to find you joking here.
morality ≠ molarity lol
molarity is the fraction
mass of substance contained in 1 L of solution ÷ molecular mass of the substance.
Note:
atomic mass of Na ~ 23
atomic mass of Cl ~ 35.5
so molecular mass of NaCl ~ 58.5
But you need to look up exact masses from periodic tables, and the answer should be accurate two significant digits (because the sample's 76 g has 2 significant digits only).
molarity is the fraction
mass of substance contained in 1 L of solution ÷ molecular mass of the substance.
Note:
atomic mass of Na ~ 23
atomic mass of Cl ~ 35.5
so molecular mass of NaCl ~ 58.5
But you need to look up exact masses from periodic tables, and the answer should be accurate two significant digits (because the sample's 76 g has 2 significant digits only).
Thank you MathMate for your time to help me :) So is the equation going to start off as 1 L / 76 g ?
No.
M = mols/L
mols = grams/molar mass
Substitute and solve for M.
M = mols/L
mols = grams/molar mass
Substitute and solve for M.
2 answers