Like other people, I have been able to do more cooking and baking during COVID quarantine and remote teaching and learning. One of the things that I have been learning to make is Irish brown bread, a rather tasty version of a “soda bread.” The bread is called a soda bread because it has baking soda (sodium bicarbonate) in it. Sodium bicarbonate is the conjugate base of carbonic acid. What is the pH of a 0.350 M solution of sodium bicarbonate? (pKa of carbonic acid = 6.35)

Consider the following data on some weak acids and weak bases: acid base K. name formula name formula -8 hypochlorous acid C6H5NH2 |4.3 × 10–10 HC1O 3.0 x 10 aniline nitrous acid HNO2 4.5 × 10 -4 hydroxylamine HONH, 1.1 x 10 -- Use this data to rank the following solutions in order of increasing pH. In other words, select a 'l' next to the solution that will have the lowest pH, a '2' next to the solution that will have the next lowest pH, and so on. solution pH 0.1 M NaNO2 choose one ♥ 0.1 M HONH3CI choose one ♥ 0.1 M KCIO choose one V 0.1 М KСI choose one ♥

A chemist dissolves 273. mg of pure nitric acid in enough water to make up 80. mL of solution. Calculate the pH of the solution. Be sure your answer has the correct number of significant digits.

A chemist must prepare 350.0 mL of hydrobromic acid solution with a pH of 1.80 at 25 °C. He will do this in three steps: • Fill a 350.0 mL volumetric flask about halfway with distilled water. • Measure out a small volume of concentrated (7.0M) stock hydrobromic acid solution and add it to the flask. • Fill the flask to the mark with distilled water. Calculate the volume of concentrated hydrobromic acid that the chemist must measure out in the second step. Round your answer to 2 significant digits. mL x10 Explanation Check O 2022 McGraw Hill LLC, All Rights Reserved. Terms of Use Privacy Center Acce: 80°F Cloudy DELL Esc F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 PrtScr Insert Delete F1 "R A # $4 & Backspace 1 3 4 6 80 E Y *00

A chemist dissolves 698. mg of pure nitric acid in enough water to make up 350. mL of solution. Calculate the pH of the solution. Be sure your answer has the correct number of significant digits.

There are 0.2 mole of HC2H3O2 and 0.2 mole of NaC2H3O2 in 0.5 liters of water (pH = 4.75). What would happen if 0.1 mole of HCl is added to the original solution?  (Write equations to show your answer.)  What is the new pH? What would happen if you added 0.1 mole NaOH to the original solution?  (Write equations to show your answer.)  What is the new pH?

A chemist dissolves 595. mg of pure nitric acid in enough water to make up 360. mL of solution. Calculate the pH of the solution. Be sure your answer has the correct number of significant digits.

A chemist dissolves 617. mg of pure barium hydroxide in enough water to make up 180. mL of solution. Calculate the pH of the solution. (The temperature of the solution is 25 °C.) Round your answer to 3 significant decimal places. ☐ x10 G

Sodium benzoate, NaC6H5COO, is used as preservatives in vinegar, soy sauce, etc. The pH of a 0.10 M aqueous solution of sodium benzoate is 8.60. What is the pKa of benzoic acid, C6H5COOH? Group of answer choices 4.20 5.40 9.80 16.20

Chemistry