1. The buffer used here is a mixture of Na₂HPO4 and KH₂PO4. What is the pH of a solution of 1.0 M Na₂HPO4 at room temper

[answerhappygod]

1 The Buffer Used Here Is A Mixture Of Na Hpo4 And Kh Po4 What Is The Ph Of A Solution Of 1 0 M Na Hpo4 At Room Temper 1 (32.09 KiB) Viewed 59 times

1. The buffer used here is a mixture of Na₂HPO4 and KH₂PO4. What is the pH of a solution of 1.0 M Na₂HPO4 at room temperature? Below is a chart of two of the K, values for H3PO4 (7 points): Compound Ka H3PO4 7.5x10-3 H₂PO4 6.2x10-8 2. Now, what is the pH of a solution of 450. mL of 1.0 M Na₂HPO4 and 650. mL of 1.0 M KH₂PO4? (5 points) 3. If I add 5.00 mL of 1.0 M HCl to the solution in problem 3 (just above), what is my new pH? (4 points) 4. Antigen tests are considered invalid if they've been out on the open air for over 15 minutes. Why might exposure to CO₂ mess up the validity of an antigen test, based on what you saw in the video? (4 points)