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In stoichiometry, we relate the quantities of the substances that are involved in a chemical reaction.
00:07
In this problem, we have the reaction between sodium hydroxide and hydrobromic acid in neutralization reaction to form sodium bromide and water according to this fanner's chemical equation.
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It is given that we have 30 ml of 0 .3 molar naoh solution and it is reacted with 0 .5 molar hbr.
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If 32 ml of hbr has been used, we want to find the ph of the resulting solution.
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We will find the minimals of both the acid and the base by multiplying their molarity by the respective volume.
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Molarity for naoh is 0 .3, volume is 30, gives us 9.
01:01
For the hbr, or the acid, we have 0 .5, that's the molarity, multiplied by its volume, 32, giving us 16.
01:14
So since hbr comes in excess, it will dominate the solution to the minimals of the excess...