Find the molarity of a solution that is made by dissolving 76.54g NaCl in enough water to make a 3,567 mL solution. Calculate the pH of a buffer solution prepared from 0.155 mol of phosphoric acid, 0.250 mol of KH_2PO_4, and enou...
What must the molarity of benzoic acid (C6H5COOH) be to get a pH of 2.25 if the pKa is 4.20? Calculate the pH of a solution made by dissolving 16.5 g of potassium acetate in 150 mL of solution. (The Ka of acetic acid is 1.8 x 10-5.) ...
To go from molarity to pH, use your calculator or a similar tool to take the logarithm to the base 10 (the default base) of the molarity, reverse the sign to get a positive value, and you're done! Example: If the molarity of an aqueous solution is 6.3 × 10-5 M, what is the ...
Now, you're going to need to use your knowledge of KW. KW=[H+][OH−] You know that since this strong base dissociates completely, the hydroxide, or OH-, concentration is equal to the molarity of the solution. [OH-] = 0.1 M. So, 1.0∗10−14M2=[H+]∗0.1M Solving for ...
Converting From pKa to Ka In some tables, you may find the pKa value listed, but you may need the Ka value to plug into your equations. The mathematical operation you perform is Ka = antilog (-pKa). You solve this by raising both sides of the original relationship to powers of 10 to...