Questions from General Chemistry

Q: Define the equivalent mass of (a) an acid and (

Define the equivalent mass of (a) an acid and (b) a base

Q: Calculate the equivalent mass of oxalic acid dehydrateH2C2O4 2H2O,12066g/

Calculate the equivalent mass of oxalic acid dehydrateH2C2O4 2H2O,12066g/mol when it is titrated to (a) a bromocresol green end point and (b) a phenolphthalein end point.

Q: At 25°C, what are the molar H3O1 and OH2

At 25°C, what are the molar H3O1 and OH2 concentrations in a. 0.0300 M HCOOH? b. 0.0600 M HN3? c. 0.200 M ethylamine? d. 0.100 M trimethylamine? e. 0.250 M C6H5COONa (sodium benzoate)? f. 0.0750 M CH3...

Q: A 10.00-mL sample of vinegar (acetic acid

A 10.00-mL sample of vinegar (acetic acid, CH3COOH) was pipetted into a flask, two drops of phenolphthalein indicator were added, and the acid was titrated with 0.1008 M NaOH a. If 45.62 mL of the bas...

Q: Why is nitric acid seldom used to prepare standard acid solutions?

Why is nitric acid seldom used to prepare standard acid solutions?

Q: Describe how Na2CO3 of primary-standard grade can be prepared from

Describe how Na2CO3 of primary-standard grade can be prepared from primary-standard NaHCO3.

Q: Four analysts perform replicate sets of Hg determinations on the same analytical

Four analysts perform replicate sets of Hg determinations on the same analytical sample. The results in ppb Hg are shown in the following table: a. State the appropriate hypotheses. b. Do the analyst...

Q: The boiling points of HCl and CO2 are nearly the same (

The boiling points of HCl and CO2 are nearly the same (285°C and 278°C). Explain why CO2 can be removed from an aqueous solution by boiling briefly while essentially no HCl is lost even after boiling...

Q: Why is it common practice to boil the solution near the equivalence

Why is it common practice to boil the solution near the equivalence point in the standardization of Na2CO3 with acid?

Q: Give two reasons why ( ( 3 2 KH IO is preferred

Give two reasons why ( ( 3 2 KH IO is preferred over benzoic acid as a primary standard for a 0.010 M NaOH solution.