Question 5 of 9 Show Answer Determine the pH of a buffer formed by dissolving 21.5 g HC,H,O2 and 37.7 g of NaC,H,O2 in 200.0 mL of solution. The value of Ka for HC,H;O2 is 6.3 x 10-5. 1 3 Based on your ICE table and Ka expression, determine the pH of the solution. pH = 5 RESET 4.2 x 10-5 6.23 4.37 2.4 x 10-11 7.77 9.63 0.880

A solution contains 0.312 M HA (K₂ = 2.20-10-7) and 0.680 M NaA. What is the pH of this solution? What is the pH of this solution after 0.212 mol of HCI are added to 1.00 L of this solution? What is the pH of this solution after 0.424 mol of HCI are added to 1.00 L of this solution? Question Help: Video Submit Question [11

Calculate the pH of a solution that is 0.200 M in NH3 and 0.300 M in NH4Cl. Calculate the pH change that takes place when a 100-mL portion of (A) 0.0500 M NaOH and (B) 0.0500 M HCl is added to 400 mL of the buffer solution. Kb = 1.75 x 10-5   show your solution in picture

This question has multiple parts. Work all the parts to get the most points. a Identify the buffer system(s) - the conjugate acid - base pair(s) - present in a solution that contains equal molar amounts of the following: (Select all that apply.) HC1 KCN | HNO2 KNO2 b (Select all that apply.) OK,CO3 H,CO3 KF HF

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for each of the five solutions calculate the equilibrium [H+] from the measured pH and determine the Kavalue. 1. pH = 2.34 // derived form 30.0 mL sample of 1.0 M HOAc 2. pH = 3.21 // derived form 30.0 mL sample of 0.1 M HOAc 3. pH = 4.88 // derived from adding 24.0 mL of 1.0 M NaOAc to 10.0 mL of 1.0 M HOAc 4. pH = 4.99 // derived from diluting 10 mL of solution 3 with 40.0 mL deionized water 5. pH = 9.33 // derived form 30.0 mL sample of 1.0 M NaOAc

Help with 4 and 5 please.