1. STEP 1: Determine amount of water in the coordination compound: a. Given the

Question

1. STEP 1: Determine amount of water in the coordination compound:

a. Given the exact mass that you weighed out in step 1.1, convert this mass of K3[Fe(C2O4)3]•3H2O into moles of K3[Fe(C2O4)3]•3H2O.

b. Given that the formula predicts that for every 1 mole of K3[Fe(C2O4)3]•3H2O, 3 moles of H2O are present, calculate how many moles of water are expected using the result in a.

c. Convert the moles of water in b into grams of water.

d. What mass of water evaporated from your sample?

e. Give the % error in the experimental value compared to the calculated value for them mass of water.

my values are: mass of watch glass: 13.269g

mass of compound and watch glass: 13.771g

mass of compound before drying: 0.505g

mass of compound after drying: 13.701g

mass of water evaporated .070g

standardized concentrarion of KMno4: .0235M

Explanation / Answer

Ans (a) 1 mole

(b) 3 moles

(c) 3× 18= 54 gms.

(d) 0.070 gms.

(e) % error. Mass of water is= 54 gms

But mass of water evaporated is = 0.070 gm

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