10 g of Ba(NO3)2 into 750 mL of water

10 g of Ba(NO3)2 into 750 mL of water

 

 

If you dissolved 10 g of Ba(NO3)2 into 750 mL of water, what is the concentration of the solution?

A. Answer in mg/dL

B. Answer in molarity

 

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A.

10 g = 10000 mg, 750 mL = 7.5 dL

 

10 g / 750 mL

= 10000 mg / 7.5 dL

= 1333.3 mg/dL

 

 

B.

Ba(NO3)2의 몰질량 = 261.34 g/mol

10 g / (261.34 g/mol) = 0.03826 mol

 

몰농도 = 용질 mol수 / 용액 L수

= 0.03826 mol / 0.750 L

= 0.05101 M

 

 

답: A. 1333.3 mg/dL, B. 0.05101 M