Gravimetric Analysis

Chemistry ⇒ Analytical Chemistry

Gravimetric Analysis starts at 11 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Gravimetric Analysis. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

See sample questions for grade 12

A hydrate sample loses 0.180 g upon heating. If the molar mass of water is 18 g/mol, how many moles of water were lost?

A sample containing sulfate ions is treated with excess BaCl₂ to form BaSO₄. If 0.233 g of BaSO₄ is obtained, calculate the mass of SO₄^2- in the sample. (Molar mass of BaSO₄ = 233 g/mol, SO₄^2- = 96 g/mol)

A sample of impure potassium chloride is analyzed gravimetrically by precipitating chloride as AgCl. If 0.287 g of AgCl is obtained, what is the percentage of KCl in the 0.500 g sample? (Molar mass: AgCl = 143.5 g/mol, KCl = 74.5 g/mol, Cl = 35.5 g/mol)

A student obtained 0.400 g of BaSO₄ from a sample. Calculate the percentage of sulfate (SO₄^2-) in a 1.00 g sample. (Molar mass: BaSO₄ = 233 g/mol, SO₄^2- = 96 g/mol)

A student obtained 0.500 g of AgCl from a sample. Calculate the amount of Cl^- (in grams) in the sample. (Molar mass of AgCl = 143.5 g/mol, Cl = 35.5 g/mol)

Define the term 'mother liquor' in the context of gravimetric analysis.

Describe the purpose of ignition in gravimetric analysis.

Explain the difference between precipitation and volatilization gravimetric methods.

Explain the term 'co-precipitation' in gravimetric analysis.

Explain why it is important to use a slightly soluble compound as the precipitate in gravimetric analysis.

Explain why slow addition of the precipitating agent is preferred in gravimetric analysis.

List two advantages and two disadvantages of gravimetric analysis.

Name two common types of gravimetric analysis.

The gravimetric factor for converting AgCl to Cl^- is (35.5/143.5). What does this factor represent?

The mass of a crucible plus dry precipitate is 25.432 g. The mass of the empty crucible is 24.987 g. What is the mass of the precipitate?

What is gravimetric analysis?

What is the effect of using excess precipitating agent in gravimetric analysis?

What is the main advantage of gravimetric analysis over some other quantitative methods?

What is the main limitation of gravimetric analysis?

What is the purpose of washing the precipitate with cold water in gravimetric analysis?