A sample with a mass equal to 0.7500 g may contain NaHCO3, Na2CO3 and/or NaOH. The sample was dissolved and titrated with a 0.1090 mol L-1 HCl solution, spending 23.00 mL to reach the phenolphthalein end point and another 15.00 mL to reach the methyl orange end point. a) Deduce the composition of the sample b) Calculate the % (w/w) of the components. Data: Na = 22.99           O = 16.00    H = 1.008        C = 12.01

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