Question

(b) Another HCl solution is labeled -0.1 M. What do we know about the pH of this solution? (C) Suppose this sample is tested and the pH meter reads 0.87. Is there a problem with the pH meter or its calibration? Explain. (d) Suppose this same sample is tested and the pH meter reads 2.94. What should you do? 5. A titration of a 20.00 mL sample of 0.1097 M HCl requires 18.86 mL of NaOH to reach the equivalence point. (a) Write a balanced chemical equation for the titration (b)Calculate the number of moles of HCI used to reach the equivalence point (c)Calculate the concentration of the NaOH solution

Answer 1

HCl (aq) + NaOH(aq) Nace(aq) + H₂O (l) Moles of Hee used at equivalence point - Molarity (M) x vol used in litres = 0.1097M X 0.020L = 0.002194 moles. c). conc. of Nabi can se calculated sy applying concentration eq?_ Mix, Cofeel a Malla (NaOH) 0.1097M X 20ML = Mg x 18.86m2 Mg = 0.1097M X Lomb 18.86 ht - 0.1163M Thus concentration of NaOH solution is 0.1163M