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A is dilute traoxosulphate (vi) acid. B contains 2.15g of sodium hydroxide per 250 cm-³...

A is dilute traoxosulphate (vi) acid. B contains 2.15g of sodium hydroxide per 250 cm-³ of solution.
In a titration experiment 25.0 of B required 20.5cm³ of A for complete neutralization.

1a. Calculate the:
i. Concentration of solution B in mol
[H=1, O= 16, Na=23]
ii. Concentrate of solution A of mol dm-³
iii. Number of hydrogen ion in 1.0 dm³ of solution
[Avogradro constant=6.02 ×10²³ mol-⁴]

The equation for the reaction is H2SO(aq) +2NaOH(aq)→Na2 So4(aq) + 2H20(I)

1bi. Name a suitable indicator that could be used in the titration
ii. What would be the color of the named indicator in.
i. Solution A
ii. Solution B
iii. A titration mixture of A and B at end point?

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