Acids & Bases 1. Label each group by the type of substance they contain. How are

Question

Acids & Bases

1.  Label each group by the type of substance they contain. How are these four groups similar? Different? Don't answer this question, I found it in Chegg. I need Q7-11

Group 1

HCl

LiOH

2. Write the chemical equation that represents each of the following substances dissolving in water. Can you represent the same reactions by using water in the equation? Don't answer this question, I found it in Chegg. I need Q7-11

HClO4

Ca(OH)2

3. Write the chemical equation that represents the interaction of water with the following substances. Can you represent the same reactions without using water in the equation?Don't answer this question, I found it in Chegg. I need Q7-11

         HNO2

         CH3NH2

4. Label the acids and bases in Q2 and Q3 as Arrhenius acid, Arrhenius base, Bronsted-Lowry acid, or Bronsted-Lowry base. If a substance can be given more than one label, do so.

Don't answer this question, I found it in Chegg. I need Q7-11

5. Identify the conjugate acid-base pairs in the equations you wrote in Q2 & Q3. What is the difference between the chemical formulas of the conjugate acid-base pairs? Don't answer this question, I found it in Chegg. I need Q7-11

6. What is the concentration of H3O+ in a 0.10M solution of HClO4? OH– concentration? pH?  Don't answer this question, I found it in Chegg. I need Q7-11

7. What is the concentration of OH– in a 0.10M solution of Ca(OH)2? H3O+? pH?

8. What is the definition of Ka? Write the Ka expression for the HClO4 reaction you wrote in Q2 AND the HNO2 reaction in Q3.

9. What is the major difference between the two Ka expressions/values in Q8? Look up the Ka value for HNO2.

10. If a 0.10M solution of HClO4 and 0.10M solution of HNO2 were prepared, which one would have the highest concentration of H3O+? Highest pH? Why?

11. Use an ICE table to determine the concentration of H3O+ in 0.10M solution of HNO2. Do your results fit with your prediction in Q10?

Group 1

Group 2 Group 3 Group 4

HCl

LiOH

HF NH3 HBr NaOH HCN CH3NH2 HI KOH HC2H3O2 (CH3)2NH HClO4 Ca(OH)2 H2SO3 HNO3 Sr(OH)2 HNO2 H2SO4 Ba(OH)2 H2CO3

Explanation / Answer

7. What is the concentration of OH– in a 0.10M solution of Ca(OH)2? H3O+? pH?

Ca(OH)2 is strong base so it gives complete ions

Ca(OH)2 ----------------------> Ca+2 + 2OH-

[OH-] = 2 x 0.10 = 0.20 M

[OH-] = 0.20 M

[H3O+] [OH-] = Kw

[H3O+] x 0.20 = 1.0 x 10^-14

[H3O+] = 5.0 x 10^-14 M

pH = -log [H3O+]

pH = (5 x 10^-13)

pH = 13.30

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