subject

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 11
A sample containing sulfate ions is analyzed gravimetrically by precipitating as BaSO4. If 0.233 g of BaSO4 is obtained, calculate the mass of SO42- in the sample. (Molar mass of BaSO4 = 233 g/mol, SO42- = 96 g/mol)
A sample of hydrated magnesium sulfate (MgSO4·xH2O) is heated until all water is lost. If the initial mass is 2.50 g and the final mass is 1.20 g, calculate the mass of water lost.
A sample of potassium chloride is analyzed gravimetrically by precipitating as AgCl. If 0.287 g of AgCl is obtained, calculate the percentage of KCl in the original 0.500 g sample. (Molar mass: AgCl = 143.5 g/mol, KCl = 74.5 g/mol)
A student is analyzing a sample for calcium by precipitating it as CaC2O4. If 0.250 g of CaC2O4 is obtained, calculate the mass of Ca2+ in the sample. (Molar mass of CaC2O4 = 128 g/mol, Ca = 40 g/mol)
A student obtained 0.400 g of PbSO4 from a sample. Calculate the mass of Pb2+ in the sample. (Molar mass of PbSO4 = 303 g/mol, Pb = 207 g/mol)
A student obtained 0.500 g of AgCl from a sample. Calculate the amount of Cl- (in grams) present in the sample. (Molar mass of AgCl = 143.5 g/mol, Cl = 35.5 g/mol)
Define co-precipitation in the context of gravimetric analysis.
Describe the purpose of ignition in gravimetric analysis.
Describe the role of a desiccator in gravimetric analysis.
Explain why gravimetric analysis is considered a primary method of analysis.
Explain why it is important to use a pure and stable precipitate in gravimetric analysis.
Explain why slow addition of the precipitating agent is preferred in gravimetric analysis.
Name one common precipitating agent used in gravimetric analysis for chloride ions.
State one reason why the precipitate is washed with distilled water during gravimetric analysis.
What is gravimetric analysis?