Blatant homework thread, but I can't do molarity for shit. "Determine the molarity of a solution that contains 55.0g HCL in 1.50 L of water." I got M=.994 with significant figures. "Calculate the mass of NaCl needed to make 2.00 L of .750 M soloution." I got 87.6 grams.

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Anonymous Mon Nov 15 20:38:01 2010 No.2061356 [Reply] [Original]

Blatant homework thread, but I can't do molarity for shit.

"Determine the molarity of a solution that contains 55.0g HCL in 1.50 L of water."

I got M=.994 with significant figures.

"Calculate the mass of NaCl needed to make 2.00 L of .750 M soloution."

I got 87.6 grams.

>>	Anonymous Mon Nov 15 21:04:01 2010 No.2061546 self bump

Anonymous Mon Nov 15 21:08:01 2010 No.2061585

>>2061356

"Determine the molarity of a solution that contains 55.0g HCL in 1.50 L of water."

(55.0g * 1 mol/36.46 g) / 1.50 L

1.0056 mol/L

1.01 mol/L with SFs

"Calculate the mass of NaCl needed to make 2.00 L of .750 M soloution."

(2.00 L * .750mol/L) (58.443 g/mol) = 87.7 g NaCl

derp

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