Question
Edexcel Paper 1 — Core Practical CP2
A student titrated 25.0 cm³ of sodium hydroxide solution with 0.10 mol/dm³ hydrochloric acid. The student used methyl orange indicator.
The average titre was 22.5 cm³ of HCl. The reaction is: NaOH + HCl → NaCl + H₂O
(a) What colour change would the student observe at the end-point using methyl orange? (1 mark) (b) Calculate the moles of HCl used. (2 marks) (c) Calculate the concentration of the NaOH solution. (3 marks)
6 marks · take your time before peeking.
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Generated by TopMyGrade AI · cross-check official sources before relying on the mark-scheme phrasing.