Use this data to rank the following solutions in order of increasing pH

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acid name formula ?? nitrous acid HNO2 4.5 * 10-4 acetic acid HCH,CO2 1.8 x1 base name formula aniline CH3NH2 4.3 x 10-10 ethylamine C2H5NH2 6.4 x 10-4 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 C6H5NH3C1 choose one 0.1 M CH5NH3BT choose one 0.1 M KCH3CO2 choose one +

The Correct Answer and Explanation is :

It seems like I can’t access the image directly. However, based on the provided data, I can help you rank the solutions in order of increasing pH.

The pH of a solution depends on whether it’s acidic or basic, and the strength of the acid or base. Here’s a breakdown of the data:

Acids:

  1. Nitrous acid (HNO2) has a Ka value of ( 4.5 \times 10^{-4} ), which means it is a weak acid.
  2. Acetic acid (CH3COOH) has a Ka value of ( 1.8 \times 10^{-5} ), which is weaker than nitrous acid.

Bases:

  1. Aniline (C6H5NH2) has a Kb value of ( 4.3 \times 10^{-10} ), which is very weak.
  2. Ethylamine (C2H5NH2) has a Kb value of ( 6.4 \times 10^{-4} ), which is stronger than aniline.

Salt Solutions:

  • NaNO2 is the salt of a weak acid (HNO2) and a strong base (NaOH). It will hydrolyze to form a basic solution.
  • C6H5NH3Cl is the salt of a weak base (aniline) and a strong acid (HCl). It will hydrolyze to form an acidic solution.
  • CH3NH3Cl is the salt of a weak base (methylamine) and a strong acid (HCl). It will also form an acidic solution.
  • KCH3CO2 is the salt of a weak acid (acetic acid) and a strong base (KOH), so it will form a basic solution.

Ranking by pH:

  1. 0.1 M C6H5NH3Cl (acidic, due to hydrolysis of aniline salt) – pH will be the lowest.
  2. 0.1 M CH3NH3Cl (similar reason as C6H5NH3Cl, weak base + strong acid) – next lowest pH.
  3. 0.1 M NaNO2 (basic solution, formed from the salt of a weak acid) – pH will be higher.
  4. 0.1 M KCH3CO2 (also a basic solution, formed from the salt of a weak acid and strong base) – highest pH.

Conclusion:

  • Rank: 1. 0.1 M C6H5NH3Cl, 2. 0.1 M CH3NH3Cl, 3. 0.1 M NaNO2, 4. 0.1 M KCH3CO2.

These rankings are based on the behavior of acids and bases in aqueous solutions and how they affect the pH through hydrolysis or dissociation.

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