Chemistry Multiple CHoice Question, please help???

[JAMES699]

Tom wishes to prepare 100 mL of a 0.010 mol/L SnF2(aq) to titrate with freshly acidfied KMnO4(aq) of uncertain concentration. The equipment available to Tom includes:

- a 100mL volumetric flask
- a 10 mL pipette
- a balance with precision of +/- 0.01 g
- 150 mL beaker.

Once Tom obtains the appropriate mass of SnF2(s), which procedure should he use to prepare this solution?

a) Place SnF2(s) in the beaker and add exactly 100mL of H20(l) from the volumetric flask.

b) Place SnF2(s) in the beaker and add exactly 100mL of H2O(l) from the pipette in 10mL portions.

c) Place SnF2(s) in volumetric flask, dissolve it in less than 100mL of H2O(l), and then dilute it to the 100 mL mark.

d) Place SnF2(s) in the beaker, dissolve it in more than 100mL of H2O(l), and then pour solution into the volumetric flask to the 100mL mark.

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Thanks for your help.