For example, a problem I have says:
"What is the molarity of 5.00 g of NaOH in 750.0 mL of solution?
2007-06-06 16:17:16 · 8 answers · asked by Nowhere Man 6 in Science & Mathematics ➔ Chemistry
M = moles / liters
1) Change grams to moles by dividing by molecular mass.
5.00 g NaOH / 40.0 g per mol = 0.125 mol
2) Change mL to L by dividing by 1000.
750.0 mL / 1000 mL per L = 0.750 L
3) Divide moles by liters to get molarity.
0.125 mol / 0.750 L = 0.167 M NaOH solution
2007-06-06 16:19:57 · answer #1 · answered by physandchemteach 7 · 7⤊ 0⤋
Grams To Molarity
2016-12-14 04:05:34 · answer #2 · answered by Anonymous · 0⤊ 0⤋
This Site Might Help You.
RE:
How do I calculate molarity given an amount of grams and milliliters?
For example, a problem I have says:
"What is the molarity of 5.00 g of NaOH in 750.0 mL of solution?
2015-08-24 06:01:04 · answer #3 · answered by Mitsuko 1 · 0⤊ 1⤋
Molarity = mols of solute / L of solvent
Convert 750 mL into 0.75 L and convert 5.00 grams of NaOH to moles, using the Molar mass = 40.
hope this helps
2007-06-06 16:20:37 · answer #4 · answered by bballl 2 · 2⤊ 0⤋
How To Get Molarity
2016-11-16 08:12:45 · answer #5 · answered by bolt 4 · 0⤊ 0⤋
convert grams to mols (you have to calculate the molar mass of the substance to do this). Then just divide that number by 0.75L to get molarity
2007-06-06 16:22:03 · answer #6 · answered by darcy_t2e 3 · 0⤊ 0⤋
Molarity is the number of moles in 1 liter of solution.
First determine the number of moles of NaOH
Moles = grams / MW = 5.00 / 40 = 0.125 moles of NaOH
But you don't have 1 L of solution, you have 0.75 L
The molarity of the solution is 0.125 / 0.75 = 0.167 Molar
2007-06-06 16:24:19 · answer #7 · answered by skipper 7 · 0⤊ 0⤋
Molarity = Moles/Volume(in liters)
NaOH has a molar mass of 40 g/mole
the number of moles= 5g/(40g/mole)=.125 moles
Volume in Liters = 750ml/1000=.750
Molarity=.125/.750=.1666666667
2007-06-06 16:28:46 · answer #8 · answered by Chelsea 1 · 0⤊ 0⤋
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