Multiple ChoiceCalculate the [H+] of a 0.50 M solution of methylammonium bromide, CH3NH3Br. The Kb of methylamine, CH3NH2, is given as 4.4 x 10-4.381views2rank2comments
Multiple ChoiceAn unknown weak acid has an initial concentration of 0.55 M. What is the pH of the solution if the weak acid also has a pKa of 5.79?318views2rank
Open QuestionCalculate [H3O+], [ClO4–], and [OH–] in an aqueous solution that is 0.130 M in HClO4(aq) at 25 °C.207views
Open QuestionWhat is the H+(aq) concentration in 0.05 M HCN(aq)? (the Ka for HCN is 5.0 x 10-10.)149views
Open QuestionWhat is the pH of a 0.0620 M solution of hydrocyanic acid, HCN (Ka = 4.9 × 10-10)?192views
Open QuestionWhat is [H+] in a 0.270 M solution of acrylic acid, CH2CHCOOH (Ka = 3.16 × 10-5)?160views
Open QuestionFormic acid is found in ant venom. What would be the pH of a 0.30 m formic acid solution? The Ka of formic acid is 1.8 x 10-4. a. 0.52 b. 4.27 c. 2.13 d. 8.61 e. 5.39150views
Open QuestionCalculate [H3O+], [ClO4–], and [OH–] in an aqueous solution that is 0.130 M in HClO4(aq) at 25°C.193views
Open QuestionWhat is [H⁺] in a 0.270 M solution of acrylic acid, CH2CHCOOH (Ka = 3.16 × 10⁻⁵)?172views
Open QuestionNitrous acid, HNO2, has a ka of 7.1 x 10–4. what is the [H3O+] in a 0.60 M solution of HNO2?151views
Open QuestionFind the percent ionization of a 0.337 m HF solution. the ka for hf is 3.5 × 10-4. What would you expect the percent ionization to be for the same concentration of hydrochloric acid (HCl)? Explain.195views
Open QuestionFind the pH of each mixture of acids. b. 0.150 M in HNO2 and 0.085 M in HNO3 c. 0.185 M in HCHO2 and 0.225 M in HC2H3O2 d. 0.050 M in acetic acid and 0.050 M in hydrocyanic acid
Open QuestionFind the pH of each mixture of acids. a. 0.075 M in HNO3 and 0.175 M in HC7H5O2 b. 0.020 M in HBr and 0.015 M in HClO4 c. 0.095 M in HF and 0.225 M in HC6H5O d. 0.100 M in formic acid and 0.050 M in hypochlorous acid
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