What is the pH of a buffer solution prepared by dissolving 0.20 mol of NaC₂H₃O₂ and 0.10 mol of HC₂H₃O₂ in enough water to give 1.00 L of solution? Ka for CH₃COOH = 1.8 x 10^-5.

When a Celsius temperature changes 30 degrees, then, the Fahrenheit will change these many degrees:

 A student prepared a 0.10 M acetic acid solution and measured its pH to be 2.88. Calculate K_a for  HC₂H₃O₂

What is the total number of orbitals associated with the principle quantum number n = 1?

Calculate the pH of an aqueous solution of 0.044 mol H₂SO₄ in 200 mL of solution.

Which one has the highest oxidation state on the central atom?

The number of grams of NaCl in 50.00 mL of 0.500 M NaCl solution is:                                           [Molar mass (g/mol): Na = 22.9, Cl = 35.45]

For n = 4, what are the possible values of l?

Which compound below has its formula written incorrectly?

What is the pH if during a titration, 40 mL of hydrochloric acid solution (HCl) required 30 mL of 0.1 M NaOH to reach the end point?