If the pH of a certain soft drink is 3.60, what is the H3O+ concentration in the soft drink?     3.6 M     2.5 × 10–3 M     2.5 × 10–4 M     2.5 × 10–5 M     10 M

The Ka for lcarbonic acid is 1.8 × 10–5. Which of the following statements best describes the pH of a 0.0010 M solution of carbonic acid?     The pH is exactly 7.     The pH is exactly 3.     The pH is greater than 7 but less than 12.     The pH is greater than 0 but less than 3.     The pH is greater than 3 but less than 7.

A 0.20 M solution of a weak monoprotic acid is 0.62 % ionized. What is the acid-ionization constant, Ka, for this acid? Group of answer choices 1.9 × 10–6 7.7× 10–6 1.1 × 10–4 2.4 × 10–5 9.7 × 10–7

Which of the following statements is true?   a basic solution has an H3O+ concentration greater than 1.0 x 10-7 M and a pH value lower than 7.0.   a basic solution has an OH- concentration greater than 1.0 x 10-7 M and a pH value lower than 7.0.   a basic solution has an H3O+ concentration greater than 1.0 x 10-7 M and a pH value greater than 7.0.   a basic solution has an OH- concentration lower than 1.0 x 10-7 M and a pH value greater than 7.0.   a basic solution has an H3O+ concentration lower than 1.0 x 10-7 M and a pH value greater than 7.0.

The chemical formulae of some acids are listed in the first column of the table below, and in the second column it says whether each acid is strong or weak. Complete the table. List the chemical formula of each species present at concentrations greater than about 10-6 mol/L when about a tenth of a mole of the acid is dissolved in a liter of water. acid HI H₂CO3 HBrO 3 H₂S strong or weak? strong weak strong weak species present at 10-6 mol/L or greater when dissolved in water 0 0 0 × 0,0,... S

A chemist must prepare 650.0 mL of nitric acid solution with a pH of 1.70 at 25 °C. He will do this in three steps: • Fill a 650.0 mL volumetric flask about halfway with distilled water. • Measure out a small volume of concentrated (9.0M) stock nitric acid solution and add it to the flask. • Fill the flask to the mark with distilled water. Calculate the volume of concentrated nitric acid that the chemist must measure out in the second step. Round your answer to 2 significant digits. mL x10 ?

A chemist must prepare 800.0 mL of potassium hydroxide solution with a pH of 12.80 at 25 °C. She will do this in three steps: • Fill a 800.0 mL volumetric flask about halfway with distilled water. • Weigh out a small amount of solid potassium hydroxide and add it to the flask. Fill the flask to the mark with distilled water. Calculate the mass of potassium hydroxide that the chemist must weigh out in the second step. Round your answer to 2 significant digits. ☐ g ☐ x10

The chemical formulae of some acids are listed in the first column of the table below, and in the second column it says whether each acid is strong or weak. Complete the table. List the chemical formula of each species present at concentrations greater than about 10 mol/L when about a tenth of a mole of the acid is dissolved in a liter of water. acid HE H₂SO, HI INO, strong or weak? weak weak strong species present at 10 mol/L or greater when dissolved in water 0 0 0 0 X 0.0 $ F &

orange juice, 3.4 × 10-4 M H+pH =

What is the concentration of hydroxide ions for an aqueous solution of acetic acid for which [H3O+] = 2.50 × 10–4 M ? [OH–]=_____