1) If 16.95 mL of 0.118 M NaOH is required to titrate a 10.00 mL of 0.100 M acid

Question

1) If 16.95 mL of 0.118 M NaOH is required to titrate a 10.00 mL of 0.100 M acid, the acid could be

a. H3AsO4

b. HNO2

c. H3PO4

d. HNO3

e. H2SO4

2.) 4.199 g of NaF(s) are dissolved in water and poured quantitatively into a 25.00 mL volumetric flask which is filled to the line with DI water and mixed well. 10.00 mL of this solution is pipetted into a 100 mL volumetric flask which is filled with DI water and mixed well. 20.00 mL of this solution is pipetted into a 100 mL volumetric flask which is filled with DI water and mixed. What is the [NaF] in this final solution?

Select one:

a. 0.05000 M

b. 0.08000 M

c. 8.000x10-5 M

d. 0.2000 M

e. 0.04000 M

Points awarded if answered within the next 18 minutes. Thanks much!

Explanation / Answer

n1M1V1 = n2M2V2

16.95 mL x 0.118 M NaOH =n2 10.00 mL x 0.100 M acid

n2=2

this is for H2SO4 ANSWER 1S e

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