2hgcl2(aq) + c2o42–(aq) → 2cl–(aq) +2co2(g) + hg2cl2(s)

the above reaction was studied by the method of initial rates and the following results were obtained:

[hgcl2] (m)

[c2o42–] (m)

initial rate (m/min)

0.105

0.15

1.8x10–5

0.105

0.30

7.2x10–5

0.0525

0.30

3.6 x10–5

0.0525

0.15

9.0x10–6

how would you describe the kinetics of this reaction? what is the rate constant?

first-order wrt hgcl2, second-order wrt c2o42–, third-order overall

k = 7.6x10–3 m–2min–1

first-order with respect to (wrt) hgcl2, first-order wrt c2o42–, second-order overall

k = 1.1x10–3 m–1min–1

zero-order wrt hgcl2, second-order wrt c2o42–, second-order overall

k = 5.4x10–5 mmin–1

first-order wrt hgcl2, second-order wrt c2o42–, second-order overall

k = 4.3x10–8 m–2min–1