85. Solving a chemistry problem

50. When titrating 50 ml of a solution containing NaOH and NH4OH, 0.01 N. HCl received the following data:

VHCl, ml Electrical conductivity, ω*103 (Ohm-1), for options
a B C
0 6.30 5.68 6.60
1 5.41 4.46 5.93
2 4.52 3.20 5.30
3 3.62 - 4.68
4 3.71 3.00 4.05
5 4.79 3.84 -
6 5.85 4.68 4.45
7 6.93 5.50 5.70
8 9.00 7.00 7.80
9 12.08 10.80 12.02
10 15.13 14.55 16.20


Build a titration graph, determine the equivalence points and calculate the concentration (g/l) of NaOH and NH4OH in the test solution (the first equivalence point corresponds to the titration of NaOH, the second to the sum of NaOH and NH4OH).

SOLUTION FOR ALL THREE OPTIONS