Questions from General Chemistry

Q: A 1.219-g sample containing (NH4)2SO4

A 1.219-g sample containing (NH4)2SO4, NH4NO3, and nonreactive substances was diluted to 200 mL in a volumetric flask. A 50.00-mL aliquot was made basic with strong alkali, and the liberated NH3 was d...

Q: A 1.421-g sample of commercial KOH contaminated by

A 1.421-g sample of commercial KOH contaminated by K2CO3 was dissolved in water, and the resulting solution was diluted to 500.0 mL. A 50.00-mL aliquot of this solution was treated with 40.00 mL of 0....

Q: A 0.5000-g sample containing NaHCO3 , Na2CO3 ,

A 0.5000-g sample containing NaHCO3 , Na2CO3 , and H2O was dissolved and diluted to 250.0 mL. A 25.00-mL aliquot was then boiled with 50.00 mL of 0.01255 M HCl. After cooling, the excess acid in the...

Q: Calculate the volume of 0.06452 M HCl needed to titrate

Calculate the volume of 0.06452 M HCl needed to titrate a. 20.00 mL of 005522MNa3PO4 to a thymolphthalein end point. b. 25.00 mL of 005522MNa3PO4 to a bromocresol green end point. c. 40.00 mL...

Q: Calculate the volume of 0.07731 M NaOH needed to titrate

Calculate the volume of 0.07731 M NaOH needed to titrate a. 25.00 mL of a solution that is 0.03000 M in HCl and 0.01000 M in H3PO4 to a bromocresol green end point. b. the solution in (a) to a thymol...

Q: A 0.6407-g sample containing chloride and iodide ions

A 0.6407-g sample containing chloride and iodide ions gave a silver halide precipitate weighing 0.4430 g. This precipitate was then strongly heated in a stream of Cl2 gas to convert the AgI to AgCl; o...

Q: A series of solutions containing NaOH,Na3AsO4 , and Na2HAsO4 ,

A series of solutions containing NaOH,Na3AsO4 , and Na2HAsO4 , alone or in compatible combination, was titrated with 0.08601 M HCl. In the following table are the volumes of acid needed to titrate 25....

Q: A series of solutions containing NaOH,Na2CO3 , and NaHCO3 ,

A series of solutions containing NaOH,Na2CO3 , and NaHCO3 , alone or in compatible combination, was titrated with 0.1202 M HCl. In the following table are the volumes of acid needed to titrate 25.00-m...

Q: How did the definition of the mole change with the 2019 redefinition

How did the definition of the mole change with the 2019 redefinition of SI base units?

Q: The seller of a mining claim took a random ore sample that

The seller of a mining claim took a random ore sample that weighed approximately 5 lb and had an average particle diameter of 5.0 mm. Inspection revealed that about 1% of the sample was argentite (see...