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Solid sodium reacts with water to produce aqueous sodium hydroxide (NaOH) and molecular hydrogen gas. Determine...

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Chemistry

Solid sodium reacts with water to produce aqueous sodiumhydroxide (NaOH) and molecular hydrogen gas. Determine the limitingreactant if 8.21 grams of sodium are reacted with 6.98 grams ofwater.

Answer & Explanation Solved by verified expert
4.1 Ratings (406 Votes)

2Na + 2H2O --->2 NaOH + H2

Molar mass of Na= 23 gm

Mass of Na= 8.21 gm

number of moles of Na = mass /molar mass

                                    = 8.21/23

                                  =0.357 mol

Molar mass of water = 18 gm

mass of water = 6.98 gm

number of moles of water = mass / molar mass

                                        = 6.98/18

                                       =0.388 mol

From reaction given 2 mol of Na requires 2 mol of water

Na available is 0.357 mol whereas water available is 0.388 mol

Clearly Na (sodium) is limiting reagent
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