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pH of a mixture of 0.01 M HCl and 0.01 M H2SO4

The same question, asked 2 times: 29 Jul 2022*, 30 Jan 2023. Every wording below, oldest first.

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  1. Question 1

    29 Jul 2022

    124
    200 mL200\text{ }mL of 0.01MHCl0.01MHCl is mixed with 400 mL400\text{ }mL of 0.01MH2SO40.01MH_{2}SO_{4}. The pHpH of the mixture is

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  2. Question 2

    30 Jan 2023

    51
    600 mL600\text{ }mL of 0.01MHCl0.01MHCl is mixed with 400 mL400\text{ }mL of 0.01MH2SO40.01MH_{2}SO_{4}. The pHpH of the mixture is____ ×10−2\times10^{- 2}. (Nearest integer) [Given log⁡2=0.30\log2 = 0.30
    log⁡3=0.48\log3 = 0.48
    log⁡5=0.69\log5 = 0.69
    log⁡7=0.84\log7 = 0.84
    log⁡11=1.04]\log11 = 1.04\rbrack