Mass Relationships in Chemical Reactions Lab

Mass Relationships in Chemical Reactions Lab

  • Submitted By: fricklers
  • Date Submitted: 11/03/2008 12:14 PM
  • Category: Science
  • Words: 598
  • Page: 3
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Mass Relationships in Chemical Reactions Lab

Aim:
The aim of this experiment is to react Sodium bicarbonate with Hydrochloric acid and to determine the reaction’s percent yield by looking to the mass (amount in mol used in calculations) of one of the products, Sodium chloride.

Introduction:
As it is known, reactions never go to completion and never have a 100% yield because of several reasons. According to the conservation of mass theory, the mass of the products and the mass of the reactants must be equal, as it never happens. The greatest reason here is that reactions don’t take place in one direction; there is always the reverse reaction too. Because of this, the reactions never go to completion in one way and the mass of the products and reactants are never the same. In this experiment, we react Sodium bicarbonate with Hydrochloric acid, to get Sodium chloride, water and Carbon dioxide. A theoretical amount is calculated for Sodium Chloride, which we measure after the reaction and heating takes place. The yield is meant to be lower than 100%; but not very low as this reaction is a very well and easy starting-happening reaction.

Method:
Materials:
1. Evaporating dish
2. Watch glass
3. Electronic balance
4. Sodium bicarbonate
5. Hydrochloric acid
6. Wire gauze
7. Ring stand
8. Wash bottle (pure water)
9. Bunsen burner

Instructions:

Raw Data Table:
Mass of empty dish and watch glass (g) Mass of dish, watch glass and NaHCO3
62.6 64.6

Processed Data Table:
Mass of NaHCO3
(g) Mass of dish, watch glass, NaCl (g), 1st heating (g) Mass of dish, watch glass, NaCl (g), 2nd heating (g) Mass of dish, watch glass, NaCl (g), 3rd heating (g) Mass of NaCl obtained
(g)
2 63.9 63.9 63.9 1.3

Calculations:

Conclusion:
The experiment was a well prepared and made accurate experiment. The percentage yield of NaCl was quite close to 100%, which is 93.53%. There were several errors in the experiment, which lead to a 6.47% less...

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