? Part C A 54.0 mL sample of an 4.5 % (m/v) KBr solution is diluted with water s

Question

? Part C A 54.0 mL sample of an 4.5 % (m/v) KBr solution is diluted with water so that the final volume is 241.5 mL Express your answer to two significant figures and include the appropriate units. ?] ? 6.7 Submit Previous Answers Reguest Answer X Incorrect; Try Again; 2 attempts remaining Enter your answer using dimensions of percent. Part D A 5.5 mL sample of a 40.5 % (m/v) acetic acid (HC2 H302) solution is added to water to give a final volume of 32 mL Express your answer to two significant figures and include the appropriate units. 1.2 Submit Previous Answers Request Answer X Incorrect; Try Again; 2 attempts remaining Enter your answer using dimensions of percent.

Explanation / Answer

54ml sample of 4.5% KBr

54ml * 4.5g/100ml    = 2.43g

molarity   = W*1000/G.M.Wt * volume of solution in ml

              = 2.43*1000/119*241.5   = 0.085M

part-D 5.5ml sample of 40.5% HC2H3O2

    5.5ml * 40.5g/100ml    = 2.2275g

molarity   = W*1000/G.M.Wt* volume of the solution in ml

              = 2.2275*1000/60*32    = 1.16M

          

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