Consider the following reaction between mercury(ii) chloride and oxalate ion.

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

the initial rate of this reaction was determined for several concentrations of hgcl2 and c2o42-, and the following rate data were obtained for the rate of disappearance of c2o42-.
experiment [hgcl2] (m) [c2o42-] (m) rate (m/s)
1 0.164 0.15 3.2x10^-5
2 0.164 0.45 2.9x10^-4
3 0.082 0.45 1.4x10^-4
4 0.246 0.15 4.8x10^-5

what is the rate law for this reaction?
(a) -k[hgcl2][c2o4-2]2-
(b) -k[hgcl2]2[c2o4-2]
(c) -k[hgcl2]2[c2o4-2]1/2

The rate law of the reaction is

Explanation:

Rate law is defined as the expression which expresses the rate of the reaction in terms of molar concentration of the reactants with each term raised to the power their stoichiometric coefficient of that reactant in the balanced chemical equation.

For the given chemical equation:

Rate law expression for the reaction:

where,

a = order with respect to

b = order with respect to

Expression for rate law for first observation:

 ....(1)

Expression for rate law for second observation:

 ....(2)

Expression for rate law for third observation:

 ....(3)

Expression for rate law for fourth observation:

 ....(4)  

Dividing 2 from 1, we get:

Dividing 2 from 3, we get:

Thus, the rate law becomes:

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

i have no clue hope you find the answer