What species is the conjugate acid of HCO3–?
Review of acids/bases and acid-base neutralization: https://www.youtube.com/watch?v=n9wUdgxCLMQ
1. What species is the conjugate acid of HCO3–?
2. Which species is the conjugate base of HPO42–?
Refresher of Acid/Base Equilibria, Ka, and pKa, and buffer solutions: https://www.youtube.com/watch?v=jdmHjFp_35I
1. The [H3O+] in a cabernet sauvignon wine is 5.9 × 10–4 M. What is the [–OH] in this wine?
2. The pH of a lime is 1.90. What is the [H3O+]?
3. What is the pH of a cleaning solution with a [H3O+] = 7.4 × 10–9 M H3O+?
4. Normal gastric juice has a pH of about 2. Assuming that normal gastric juice is primarily aqueous HCl, what is the concentration of HCl in the stomach?
5. The Ka of acetic acid is 1.7 × 10-5. What is the pKa of acetic acid?
6. The of formic acid is pKa 3.750. What is the Ka of formic acid?
Titrations: Setting up and performing a titration: https://www.youtube.com/watch?v=sFpFCPTDv2w&t=48s
Titration calculation demonstration: https://www.youtube.com/watch?v=2z4mlE6MK0U
1. What is the molarity of an HCl solution if 43.6 mL of a 0.125 M KOH solution are needed to titrate a 25.0 mL sample of the acid according to the equation below?
2. How many milliliters of 0.653 M NaOH are needed to neutralize 25.0 mL of a 1.02 M HBr solution? The neutralization reaction is:
3. Each day, the stomach produces 2.0 L of gastric juice that contains 0.10 M HCl. Phillips Milk of Magnesia is a white-colored, aqueous, mildly alkaline suspension of magnesium hydroxide formulated at 8.0 % (w/v). It would take ________ mL of milk of magnesia to titrate the stomach acid produced in each day. (Mg(OH)2 molar mass = 58.32 g/mol)
Buffers: Demonstration of buffered versus unbuffered solution: https://www.youtube.com/watch?v=P-R-Cqvb5yo
1. What is the pH of a buffer that contains 0.15 M CH3COOH and 0.10 M NaCH3COO(Ka = 1.8 × 10–5)?
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