Henderson-Hasselbalch equation for a propanoic acid solution (CH3⁢CH2⁢CO2H, p?a=4.874). Using the equation to calculate the quotient [A−]/[HA] at three different pH values. pH=4.311 pH=4.874 pH=5.061

Consider a solution initially containing 0.30 M of CH3NH2 mixed with 0.50 M of CH3NH3Cl in water. What is the pH after the addition of 6.415 mL of 0.10 M NaOH to 19.41 mL of this solution? (Kb for CH3NH2 = 4.47 × 10–4) Express your answer using at least three significant figures. Do not use scientific notation.

Valine (HV) is a diprotic amino acid with Ka = 5.18 x 10-3 and K2 = 1.91 x 10-10. Determine the pH of each of the solutions. A 0.250 M valine hydrochloride (H, V+Cl-) solution. pH A 0.250 M valine (HV) solution. pH = A 0.250 M sodium valinate (Na+V¯) solution.

1. (1 point) The [H+] of coffee is about 1 x 10. Its pH is 2. (1 point) The [OH-] of baking soda is about 1 x 10. Its pH is 9. The [H+] is 3. (4 points) Balance these equations by putting the number coefficients to the left of each product or reactant. If no number is needed (coefficient = 1), then leave that space blank. Al + O2 → Al2O3 а. NażCO3 + HCI → NaCl + CO2 + H20 C3H8 + O2 → CO2 + H2O с. d. CSH12 + O2 → CO2 + H2O 4. (1 point) How much does 2 moles of NaBr weigh? on's irtday pa There West oute, Kelvins (1 point) Caffeine has a molecular weight of 194 g/mole. If I drink a Venti coffee from Starbucks every day, I have consumed 156g of caffeine in a year! How many moles of caffeine have I consumed on my $967.25 of coffee in a year? 5. to hand-boil an esg in a microwave. The egg was 276K and I ATM. Imicrowaved it until the internal