Questions from General Chemistry

Q: For each of the following solutions, the number of moles of

For each of the following solutions, the number of moles of solute is given, followed by the total volume of the solution prepared. Calculate the molarity of each solution. a. 0.521 mol NaCl; 125 mL...

Q: For each of the following solutions, the number of moles of

For each of the following solutions, the number of moles of solute is given, followed by the total volume of the solution prepared. Calculate the molarity of each solution. a. 0.754 mol KNO3; 225 mL...

Q: For each pair of concentrations, tell which represents the more acidic

For each pair of concentrations, tell which represents the more acidic solution. a. [H+] = 1.2 * 10-3 M or [H+] = 4.5 * 10-4 M b. [H+] = 2.6 * 10-6 M or [H+] = 4.3 * 10-8 M c. [H+] = 0.000010 M or...

Q: Sulfuric acid has a great affinity for water, and for this

Sulfuric acid has a great affinity for water, and for this reason, the most concentrated form of sulfuric acid available is actually a 98.3% solution. The density of concentrated sulfuric acid is 1.84...

Q: For each pair of concentrations, tell which represents the more basic

For each pair of concentrations, tell which represents the more basic solution. a. [H+] = 2.02 * 10-7 M or [OH-] = 5.05 * 10-5 M b. [H+] = 1.79 * 10-5 M or [OH-] = 4.21 * 10-6 M c. [H+] = 1.25 * 10...

Q: A laboratory assistant needs to prepare 225 mL of 0.150

A laboratory assistant needs to prepare 225 mL of 0.150 M CaCl2 solution. How many grams of calcium chloride will she need?

Q: How many grams of formaldehyde are in 113.1 mL of

How many grams of formaldehyde are in 113.1 mL of a 3.0 M aqueous solution of formaldehyde? The formula for formaldehyde is HCHO.

Q: Standard solutions of calcium ion used to test for water hardness are

Standard solutions of calcium ion used to test for water hardness are prepared by dissolving pure calcium carbonate, CaCO3, in dilute hydrochloric acid. A 1.745-g sample of CaCO3 is placed in a 250.0-...

Q: An alcoholic iodine solution (“tincture” of iodine) is prepared

An alcoholic iodine solution (“tincture” of iodine) is prepared by dissolving 5.15 g of iodine crystals in enough alcohol to make a volume of 225 mL. Calculate the molarity of iodine in the solution....

Q: If 42.5 g of NaOH is dissolved in water and

If 42.5 g of NaOH is dissolved in water and diluted to a final volume of 225 mL, calculate the molarity of the solution.