mistake in general chem destroyer 231

[i4everpaki]

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This is problem 231 in 2010 destroyer. Take a look at it and tell me what you think.

The solution gives the example of

(.120)V1 = (.20)(60)
.120V1 = 1.20
V1 = 10

isn't .20 x 60 = 12... not 1.20
so V1 = 100

the half equivalence point should be 50.

 

[RCT PC CRN]

Must be an error. I got 50 ml too.

60*0.20=12 mmol
X ml*0.120= M mmol

3.3=3.3+log (M/12-M)
M=6

X ml * 0.120 = 6 mmol
X= 50 ml

 

[NewBee12]

Hi i4everpaki 🙂
you are correct. I emailed orgoman and he replied and said it was a typo and it was already fixed.
hope this helps