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11.06.2020 •
Chemistry
A 11.0 mLmL sample of 0.30 MHBrMHBr solution is titrated with 0.16 MNaOHMNaOH. Part A What volume of NaOHNaOH is required to reach the equivalence point? Express the volume to two significant figures and include the appropriate units. nothingnothing
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Ответ:
21 mL of NaOH is required.
Explanation:
Balanced reaction:![HBr+NaOH\rightarrow NaBr+H_{2}O](/tpl/images/0682/9396/7b2de.png)
Number of moles of HBr in 11.0 mL of 0.30 M HBr solution
=
moles = 0.0033 moles
Let's say V mL of 0.16 M NaOH solution is required to reach equivalence point.
So, number of moles of NaOH in V mL of 0.16 M NaOH solution
=
moles = 0.00016V moles
According to balanced equation-
1 mol of HBr is neutralized by 1 mol of NaOH
So, 0.0033 moles of HBr are neutralized by 0.0033 moles of NaOH
Hence,![0.00016V=0.0033](/tpl/images/0682/9396/46b03.png)
So, 21 mL of NaOH is required.
Ответ: