Chemistry: Stoichiometry 
2 NaOH + H_{2}SO_{4} > 2 H_{2}O + Na_{2}SO_{4}

Compound

Molar Masses (g/mole)

NaOH

40.0

H_{2}SO_{4}

98.1

H_{2}O

18.0

Na_{2}SO_{4}

142

_{
}
Example:
If the reaction starts with 50.0g of NaOH, how many grams of Na_{2}SO_{4} will form?
Solution:



General Questions 



If the reaction consumes 100 g of NaOH, how many grams of Na_{2}SO_{4} should form? 
If 475 g of H_{2}O form, predict how many grams of NaOH must have been consumed? 
The reaction generates 35.0 g of Na_{2}SO_{4}. How many grams of H_{2}SO_{4 }should have been used up? 
If 25.0 g of NaOH is used, how many grams of H_{2}SO_{4} should react? 

Question Group #2 

Directions and/or Common Information: A reaction produces 100 g of H_{2}O. 

How many grams of NaOH will be consumed? 
How many grams of H_{2}SO_{4} will be consumed? 
If the law of conservation of mass holds true, the total mass of the reactants (NaOH and H_{2}SO_{4}) should equal the total mass of the products (H_{2}O and Na_{2}SO_{4}). Without doing a stoichiometry problem, predict how many grams of Na_{2}SO_{4} should form. 




E Saylor


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