Answer Happy

Part B: Salts Question 1 (0.25 points) After you have completed Step 7 (in Part B), use your experimental observation of the contents of well A1 along with the Universal Color guide from your lab kit (shown below as a reminder) to determine the pH of your NaCl solution. (Choose the pH that most closely matches your observation). SE SU FLINN SCIENTIFIC INC. 05 07

Question 2 (0.25 points) Based on your results, the NaCl solution is O acidic. basic. neutral. Question 3 (0.25 points) After you have completed Step 7 (in Part B), use your experimental observation of the contents of well A2 along with the Universal Color guide from your lab kit (shown below as a reminder) to determine the pH of your NaH2PO4 solution. (Choose the pH that most closely matches your observation). Os 07 9

Question 4 (0.25 points) Based on your results, the NaH2PO4 solution is acidic. basic. neutral. Question 5 (0.25 points) After you have completed Step 7 (in Part B), use your experimental observation of the contents of well A3 along with the Universal Color guide from your lab kit (shown below as a reminder) to determine the pH of your Na2HPO4 solution. (Choose the pH that most closely matches your observation). 5 07 09

Question 6 (0.25 points) Based on your results, the Na2HPO4 solution is acidic. basic. neutral.

Parts C, D and E: Buffers Question 7 (0.5 points) Using your experimental results for Well 1 and Well 2 in Row B (NaH₂PO4(aq) + Na₂HPO4(aq)): When you added HCI, did the pH change? Yes, the color and therefore pH changed by quite a bit No, the color and the pH stayed close to the original Question 8 (0.5 points) Using your experimental results for Well 1 and Well 3 in Row B (NaH₂PO4(aq) + Na₂HPO4(aq)): When you added NaOH, did the pH change? Yes, the color and therefore pH changed by quite a bit No, the color and the pH stayed close to the original

Question 9 (0.5 points) ✓ Saved Is the NaH₂PO4 + Na2HPO4 mixture a buffer? yes O no Question 10 (0.5 points) Using your experimental results for Well 1 and Well 2 in Row C (water): When you added HCI, to water, did the pH change? Yes, the color and therefore pH changed by quite a bit No, the color and the pH stayed close to the original Question 11 (0.5 points) Using your experimental results for Well 1 and Well 3 in Row D (water): When you added NaOH to water, did the pH change? Yes, the color and therefore pH changed by quite a bit O No, the color and the pH stayed close to the original

Question 12 (0.5 points)✓ Saved Is water (H₂O) a buffer? O yes no Question 13 (0.5 points)✔ Saved Using your experimental results for Well 1 and Well 2 in Row D (NaCl(aq)): When you added HCI to NaCl(aq). did the pH change? Yes, the color and therefore pH changed by quite a bit No, the color and the pH stayed close to the original Question 14 (0.5 points) Using your experimental results for Well 1 and Well 3 in Row D (NaCl(aq)): When you added NaOH to NaCl(aq), did the pH change? Yes, the color and therefore pH changed by quite a bit O No, the color and the pH stayed close to the original

Question 15 (0.5 points) ✓ Saved Is the NaCl(aq) solution a buffer? yes O no