How may grams of solute are needed to prepare the following solutions? 1.000L of 240.0M NaCl 250.0 mL...

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Chemistry

How may grams of solute are needed to prepare the followingsolutions?
1.000L of 240.0M NaCl
250.0 mL of 0.135 M CuSO4
500.0 mL of 0.370 M CH3OH
Also, please tell how you got answers so I can know how to getcalculations myself. THANK YOU :-)

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3.7 Ratings (434 Votes)

1) The mass of NaCl required to prepare 1.0 L of 0.240 M NaCl = (0.240 mol/L)(1.0 L) (58.44 g/mol) = 14.02 g

2) The mass of CuSO₄ required to prepare 250 mL of 0.135 M CuSO₄

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = (0.135 mol/L)(0.250 L) (159.61 g/mol) = 5.386 g CuSO₄

3) The mass of CH₃OH required to prepare 500 mL of 0.370 M CH₃OH

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = (0.370 mol/L)(0.5 L) (32.0 g/mol) = 5.92 g CH₃OH

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