Chemistry
Brittbratt212
2016-04-20 07:50:57
A 25.0 ml sample of an unknown hbr solution is titrated with 0.100 m naoh. the equivalence point is reached upon the addition of 18.88 ml of the base. what is the concentration of the hbr solution?
ANSWERS
Rinchan
2016-04-20 12:47:57

1) Neutralization equation: HBr + NaOH --> NaBr + H2O 2) 1: 1 molar ratio => 1 mol NaOH neutralizez 1 mol HBr 3) M = n / V => n = M*V => M*V for NaOH = M*V for HBr 0.01888 l * 0.100M = x * 0.025 l =>  0.01888 l * 0.10 M / 0.025 l = 0.0755 M Answer: 0.0755 M

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