Q 20 Which mixture of solutions having pH 7 Given H CO3 K1 4

Last updated: 7/3/2023

Q 20 Which mixture of solutions having pH 7 Given H CO3 K1 4 2 x 10 7 K 4 8 10 11 H3PO4 K1 7 5 x 10 3 K 6 2 x 10 8 K3 1 0 10 12 Answer A B C Your Attempt Correct answer 40 ml of 0 050 M Na2CO3 50 ml of 0 040 M HCI 40 ml of 0 020 M Na3PO4 40 ml of 0 040 M HCI 50 ml of 0 10 M Na3PO4 50 ml 0 10 M NaH2PO4 O D 40 ml of 0 10 M H3PO4 40 ml of 0 10 M Na3PO4