How would the following modifications of the experimental procedure used in this

Question

How would the following modifications of the experimental procedure used in this experiment affect the mass of the precipitate collected? Indicate whether the mass would be greater than, unchanges, or less than that obtained. Briefly explain the answer.

a, Adding the CoCl2 solution to the Na3PO4 solution, instead of the reverse

b. Performing the reaction at 40 degrees Celsius, instead of at room temperature

c. The residue collected on the filer paper was not washed with cold water?

d. The residue was washed with hot distilled, deionized water instead of cold distilled, deionized water

e. 6.00mL of 2.00M CoCl2 reacted with 1.00mL 1.00M Na3PO4 instead of reacting 6.00ML of 1.00M CoCl2 with 1.00ML 1.00M Na3PO4

Explanation / Answer

a, Adding the CoCl2 solution to the Na3PO4 solution, instead of the reverse

Ans: No changes

b. Performing the reaction at 40 degrees Celsius, instead of at room temperature

Ans: With increase in temperature solubility of precipitate precipitate may be increased so that we would get less amount.

c. The residue collected on the filer paper was not washed with cold water?

Ans: if we do not wash the obtained compound with water, the impurities will not be removed. Therefore we would get greater amount.

d. The residue was washed with hot distilled, deionized water instead of cold distilled, deionized water

Ans: Solubility of the obtained compound may be different(high) in hot water, so that we may get less amount.

e. 6.00mL of 2.00M CoCl2 reacted with 1.00mL 1.00M Na3PO4 instead of reacting 6.00ML of 1.00M CoCl2 with 1.00ML 1.00M Na3PO4

Ans: Definitely we would get different amount of the compound by changing the concentration of compounds.

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