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Zigmanuir [339]
3 years ago
5

Assuming equal concentrations and complete dissociation, rank these aqueous solutions by their freezing points from highest to l

owest. CoCl3, NH4Cl, Li2SO4
Chemistry
1 answer:
muminat3 years ago
4 0

Answer:

NH4Cl > Li2SO4 > CoCl3

Explanation:

Let us recall that the freezing point depression depends on the molality of the solution and the number of particles present.

Let us also recall that freezing point depression is a colligative property. It depends on the number of particles present in solution.

Usually, the more the number of particles present, the lower the freezing point. Hence, NH4Cl which has only two particles will have the highest freezing point while CoCl3 which has four particles will have the lowest freezing point.

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For an element whose third shell contains six electrons, the appropriate electron configuration is; 1s2 2s2 2p6 3s2 3p4.

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We have been told that the six electrons are found in the third shell. This shell has n=3 and the configuration of this shell must ns2 np4.

The only electron configuration that meets this standard is 1s2 2s2 2p6 3s2 3p4.

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The amount of heat released by the sample has been 22.54 kJ. Thus, option C is correct.

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The iron and calorimeter are in side the closed system. Thus, the energy released by the sample, has been equivalent to the energy absorbed by the calorimeter.

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The given mass of calorimeter has been, m_{calorimeter}=1350\;\rm g

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