Question: QUESTION1 which is incorrect statement for gravimetric analysis? -precipitation must be free from soluble impurities -precipitates must be convertible into a pure compound -precipitates may

QUESTION1

which is incorrect statement for gravimetric analysis?

-precipitation must be free from soluble impurities

-precipitates must be convertible into a pure compound

-precipitates may not be readily separated from the solution byfiltration.

-precipitates must be insoluble in solution

QUESTION2

in gravimetric analysis ,heating gently during thecoagulation stage would aid what process

-filtration

-evaporation

-precipitation

-digestion

question 3

in gravimetric analysis

-the mass of a solution is used to calculate the quantity of theoriginal analyte

-the mass of a product is used to calculate the quantity of theoriginal analyte

-the mass of the product is used to calculate the quantity ofthe impurity

-none of the above

QUESTION 4

which of the following statement is correct 1

.if the RSS is high then the precipitate is small and you get acolloidal material

2.if the RSS is small then the precipitate is small and you geta colloidal material

3.if the RSS is high then the precipitate is small and you get acrystalline material

4.if relative supersaturation is high the the precipitate sizeis large and get colloidal

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