A researcher starts with 10 mL of 0.10 M aqueous solution A and performs a complete titration by adding 0.10 M aqueous solution B. The recorded pHs are collected and plotted below. volume of B added (mL) Which of the following best describes the identities of solution A and solution B?
| solution A | solution B | |
| A) | HClO4 | NaOH |
| b) | HClO | NaOH |
| c) | CH3NH2 | HCl |
| d) | H2SO3 | NaOH |
| e) | NaOH | H3PO4 |
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