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In the reaction of sulfuric acid with sodium hydroxide,

1 mole of sulfuric acid reacts with 2 moles of sodium hydroxide,

to create 1 mole of sodium sulfate, and 2 moles of water.

[NOISE] The question asks us, how many grams of sodium hydroxide we

need to completely react with 100 grams of sulfuric acid.

Therefore, we need to convert the grams that we're given into moles,

because we know the mole ratio.

We know that 1 moles of sulfuric acid reacts with 2 moles, of sodium hydroxide.

Let's start by converting the grams of sulfuric acid into moles.

In order to do that, we need the formula mass for sulfuric acid.

We can calculate this using a technique we learned in an earlier lecture.

Hopefully you've become skilled enough to realize,

that 1 mole of sulfuric acid has a mass of 98.1 grams.