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DP IB Chemistry: SL

Topic Questions

Home / IB / Chemistry: SL / DP / Topic Questions / 8. Acids & Bases / 8.2 More About Acids / Multiple Choice: Paper 1


8.2 More About Acids

Question 1

Marks: 1

Which of the following statements is incorrect about  0.01 mol dm–3 CH3COOH?

  • the pH = 2

  • [H+] << 0.01 mol dm–3

  • [CH3COO] is approximately equal to [H+]

  • CH3COOH is partially ionized

Choose your answer
  

Question 2

Marks: 1

Two flasks contain two different acids labelled as HA and HB. A student measures the pH of each flask, and finds that they are pH 1 and pH 3 respectively. Which of the following statements is true?

  • HA is a stronger acid than HB

  • HB is a stronger acid than HA

  • The [H3O+] in the solution of HB is 3 times greater than the [H3O+] in the solution of HA.

  • The [H3O+] in the solution of HA is 100 times greater than the [H3O+]  in the solution of HB.

Choose your answer
  

Question 3

Marks: 1

Which of the following solutions will have the largest amount of H+ ions in moles?

  • 20 cm3 of 2.0 mol dm−3 sulfuric acid

  • 10 cm3 of 3.0 mol dm−3 nitric acid

  • 80 cm3 of 0.5 mol dm−3 hydrochloric acid

  • 40 cm3 of 1.0 mol dm−3 ethanoic acid

Choose your answer
  

Question 4

Marks: 1

If the pH of two acids, X and Y, are pH 1 and pH 2 respectively, which of the following is true?

  1. X and Y could be strong or weak acids
  2. The concentration of [H+] ions in X is higher than in Y
  3. Acid X is stronger than acid Y
  • I and II only

  • I and III only

  • II and III only

  • I, II and III

Choose your answer
  

Question 5

Marks: 1

A student has two flasks containing 150 cm3 of nitric acid, HNO3(aq) and ethanoic acid, CH3COOH(aq). She writes the following three statements in her notebook about the acids. Which of them are correct?

  1. HNO3 dissociates more than CH3COOH
  2. HNO3 conducts electricity better than CH3COOH
  3. more NaOH can be neutralized with HNO3 than CH3COOH
  • I and II only

  • I and III only

  • II and III only

  • I, II and III

Choose your answer
  

Question 6

Marks: 1

Which row shows the correct colours for two common indicators used in acid-alkali titrations?

phenolphthalein

methyl orange

 

colour in acid

colour in alkali

colour in acid

colour in acid

A

pink

colourless

yellow

red

B

colourless

pink

yellow

red

C

pink

colourless

red

yellow

D

colourless

pink

red

yellow

 

    Choose your answer
      

    Question 7

    Marks: 1

    In a titration, the equivalence point is reached when 23.70 cm3 of 0.02 mol dm-3 potassium hydroxide reacts with 0.03 mol dm-3 of sulfuric acid. What volume of acid is needed?

    • begin mathsize 16px style fraction numerator 2 blank cross times blank 0.02 blank cross times blank 23.70 over denominator 0.03 end fraction end style

    • begin mathsize 16px style fraction numerator 0.03 over denominator 2 blank cross times blank 0.02 blank cross times blank 23.70 end fraction end style

    • begin mathsize 16px style fraction numerator 0.02 blank cross times blank 23.70 over denominator 0.03 end fraction end style

    • begin mathsize 16px style fraction numerator 0.03 blank cross times blank 23.70 blank over denominator 2 blank cross times blank 0.02 end fraction end style

    Choose your answer
      

    Question 8

    Marks: 1

    What is the number of moles of barium hydroxide in a 100 cm3 solution with a pH of 11 at 25 ℃?

    (Kw = 1.00 x 10-14 mol2 dm-6 at 298 K)

    • 1 begin mathsize 16px style cross times end style 10-11 mol 

    • 1 begin mathsize 16px style cross times end style 10-3 mol

    • 0.5 begin mathsize 16px style cross times end style 10-3 mol

    • 0.5 begin mathsize 16px style cross times end style 10-4 mol

    Choose your answer
      

    Question 9

    Marks: 1

    What is the pH of a solution made by adding 6.0 g of sodium hydroxide to 1 dm3 of water at 298K? (Mr NaOH = 40.0)

    (Kw = 1.00 x 10-14 mol2 dm-6 at 298 K)

    • -logbegin mathsize 16px style open parentheses fraction numerator 6.0 blank cross times blank 10 to the power of negative 14 end exponent over denominator 40.0 end fraction close parentheses end style

    • -logbegin mathsize 16px style open parentheses fraction numerator 40.0 blank cross times blank 10 to the power of negative 13 end exponent over denominator 6.0 blank cross times blank 1000 end fraction close parentheses end style

    • -logbegin mathsize 16px style open parentheses fraction numerator 4.0 blank cross times blank 10 to the power of negative 15 end exponent over denominator 6.0 end fraction close parentheses end style

    • -logbegin mathsize 16px style open parentheses fraction numerator 4.0 blank cross times blank 10 to the power of negative 13 end exponent over denominator 6.0 end fraction close parentheses end style

    Choose your answer
      

    Question 10

    Marks: 1

    Which values are correct for a solution that contains 0.056 g of KOH (Mr= 56) in 100 cm3 of water?

    (Kw = 1.00 x 10-14 mol2 dm-6 at 298 K)

    • [H+] = 1.0  10-2 mol dm-3 and pH = 2.00

    • [OH-] = 1.0  10-2 mol dm-3 and pH = 2.00

    • [H+] = 1.0  10-12 mol dm-3 and pH = 12.00

    • [OH-] = 1.0  10-12 mol dm-3 and pH = 2.00

    Choose your answer