Question

In: Chemistry

determine the total mass gain or loss for the reaction by comparing your initial mass to...

determine the total mass gain or loss for the reaction by comparing your initial mass to your final mass. combined mass of vinegar and baking soda.
initial total mass?
final total mass?
difference?
run 1 grams of sodium bicarbonate 1.3
molar mass 84.006
number of moles 0.015475
0.88g acetic acid
molar mass 60
number of moles 0.0154
what is the formula? and what Do I use to figure this out?
thanks

Solutions

Expert Solution

Baking soda and vinegar react with each other because of an acid-base reaction.

Baking soda is a bicarbonate (NaHCO3) and vinegar is an acetic acid (CH3COOH). One of the products this reaction creates is carbon dioxide.

The first reaction is this:

CH3COOH + NaHCO3 CH3COONa + H2CO3

It would form Sodium Acetate and Carbonic Acid. The Carbonic Acid will then break down into Carbon Dioxide and Water:

H2CO3 = H2O + CO2

Making the overall equation

CH3COOH + NaHCO3 CH3COONa + CO2 + H2O
0.88g 1.3 g
0.0147 mol 0.0155 mol

In the above reaction equation,

1 mol of CH3COOH reacts with 1 mol of NaHCO3 produces 1 mol of CH3COONa, 1mol of CO2 and 1 mol of H2O.

0.0147 mol of CH3COOH reacts with 0.0147 mol of NaHCO3 .

So, excess moles of NaHCO3 left after reaction =  0.0155 mol - 0.0147 mol

= 0.0008 mol

Molar mass of NaHCO3 = 84.006 g/mol

So, 1 mole of NaHCO3 = 84.006 g

0.0008 mole of NaHCO3 = 0.0008 x 84.006 g = 0.0672 g




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