Posted by Fai on Sunday, August 19, 2012 at 8:07pm.
What is the molarity of 100ml of ethanol dissolved in 1.5L of water? Ethanol has a specific of 0.789, and its molecular weight is 46g/mol.
My calculation
0.789 x 1.5L = 1.1184
1.184/46g = 0.025
x= 26M
I am not sure answer. Pls help

chemistry  DrBob222, Sunday, August 19, 2012 at 9:00pm
M = mols/L soln
How much does 100 mL ethanol weigh? That is m = v x d = 100 mL x 0.789 g/mL = 78.9g and that is 78.9/46 = 1.715 mols.
So 1.715 mol/L soln is molarity. Your problem has the ethanol dissolved in 1.5 L so the final solution is 1.5L + 0.100L IF (and it's a big if) the volumes are additive. They aren't but the only way we can finsh the problem is to assume they ARE additive. Therefore, 1.5L H2O + 0.100 L ethanol adds to make 1.6L of solution if the solutions are additive.
Then 1.715/1.6L = ? molarity.
Answer This Question
Related Questions
 chemistry  What is the molarity of 100 ml of ethanol dissolved in 1.5 liters of...
 math  what is the mass of 1.00 L of ethanol? Ethanol has a density of 0.798 g/...
 chem 101  60F is 15.55 C 180 F is 82.22C delta T = 82.2215.55 = 66.67 q = mass...
 Chemistry  How much heat is required to convert 32.5 grams of ethanol at 28 C ...
 CHEMISTRY  You mix 40.0 g of ethanol (C2H5OH, molecular weight = 46.1 g/mol) ...
 chemistry  What is the mass/vol % ethanol in an ethanolwater solution with ...
 chemistry  Calculate the molarity and mole fraction of a 2.35 m solution of ...
 chemistry  What is the mass percent of a solution if 42.9 grams of aspirin is ...
 chemistry  What is the mass percent of a solution if 42.9 grams of aspirin is ...
 chemistry  A 52.3 kg sample of ethanol is needed for a reaction. What volume in...
More Related Questions