Asked by bekah
A 20.0% (w/w) aqueous solution of NaOH has a density of 1.125 g/cm^3. What is the molarity (M) of this solution?
Answers
Answered by
DrBob222
In one neat and tidy equation it is
1.125 g/cc x 1000 cc x (20/100) x (1 mol/40g) = ? Molar
In pieces.
mass of 1000 cc is 1.125 g/cc x 1000 cc = ?
mass of NaOH in that 1000 cc solution is ?mass x 0.20 = ?
mols NaOH in that mass NaOH is ?grams/molar mass
All of that gives you mols NaOH/L solution and that's the definition of molarity.
1.125 g/cc x 1000 cc x (20/100) x (1 mol/40g) = ? Molar
In pieces.
mass of 1000 cc is 1.125 g/cc x 1000 cc = ?
mass of NaOH in that 1000 cc solution is ?mass x 0.20 = ?
mols NaOH in that mass NaOH is ?grams/molar mass
All of that gives you mols NaOH/L solution and that's the definition of molarity.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.