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Lesson 2: Ionic Equilibrium, pH Scale, Hydrolysis and Solubility Product (Ksp) — Picture questions (exam style)

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  • Questions count: 5
  • Passing grade: 60%
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1.
40 mL of 0.1 M HCl is mixed with 20 mL of 0.2 M NaOH as shown. Which option is correct?
40 mL of 0.1 M HCl is mixed with 20 mL of 0.2 M NaOH as shown. Which option is correct?
pH = 7.00, the solution is basic
pH = 7.00, the solution is neutral
pH = 13.30, the solution is basic
pH = 13.30, the solution is neutral
2.
Equal-concentration aqueous solutions of the salts shown. Arrange them in increasing pH.
Equal-concentration aqueous solutions of the salts shown. Arrange them in increasing pH.
CuSO₄ < K₂CO₃ < NaCl
CuSO₄ < NaCl < K₂CO₃
K₂CO₃ < NaCl < CuSO₄
K₂CO₃ < CuSO₄ < NaCl
3.
Find [H+] in a 0.2 M weak acid with Ka = 2.50×10−6.
Find [H⁺] in a 0.2 M weak acid with Ka = 2.50×10⁻⁶.
2.50×10−7 mol/L
3.54×10−3 mol/L
5.00×10−7 mol/L
7.07×10−4 mol/L
4.
Equal-concentration aqueous solutions of the salts shown. Arrange them in increasing pH.
Equal-concentration aqueous solutions of the salts shown. Arrange them in increasing pH.
NaHCO₃ < NH₄Cl < Na₂CO₃
Na₂CO₃ < NH₄Cl < NaHCO₃
NH₄Cl < NaHCO₃ < Na₂CO₃
NaHCO₃ < Na₂CO₃ < NH₄Cl
5.
Find [H+] in a 1.0 M weak acid with Ka = 1.40×10−3.
Find [H⁺] in a 1.0 M weak acid with Ka = 1.40×10⁻³.
0.0651 mol/L
0.0374 mol/L
7.00×10−4 mol/L
1.40×10−3 mol/L
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