Limiting Reagent Problem Set
This problem set was developed by S.E. Van Bramer for Chemistry 145 at Widener University.
- The Kingston Steam Plant burns 14,000 tons of coal each day and generates 1010 kilowatts-hours of electricity each year (enough for 700,000 homes). Coal is primarily carbon which undergoes combustion in the following reaction:
C(s) + O2 (g) -> CO2(g)
- How many grams of oxygen is required for the combustion of 1 day's coal?
- How much carbon dioxide is produced each day?
- CO2 is removed from the atomsphere by trees and converted into cellulose. The basic reaction for this is:
6 CO2 (g) + 5 H2O (l) -> C6H10O5 (s) + 6 O2 (g)
- How many grams of water are required to process the CO2 from one day's electrical production at the Kingston Steam Plant?
- How much oxygen is produced by this process?
- How much cellulose is produced?
- If you assume that a tree weigh's 2 tons, how many trees are required to process the CO2 produced in one day?
- A typical automobile gets 30 miles per gallon of gas and drives 12,000 miles every year. Assuming that octane (C8H18, density 0.7025 g cm-3) is a principal component of gasoline;
- How much oxygen is required for a car to run for 1 year?
- How much CO2 is produced by the car in 1 year?
- How many trees are required to remove the CO2 produced by the car in 1 year?
- Modern instrumental techniques are capable of detecting lead in a milliliter sample at picomolar concentration.
- How many moles of lead are in the sample?
- What is the mass of lead in this sample?
- How many grams of sodium chloride would be required to precipitate all the lead in this sample as lead (II) chloride?
- What would the mass of the lead (II) chloride precipitate be?
Please send comments or suggestions to email@example.com
Scott Van Bramer
Department of Chemistry
Chester, PA 19013
© copyright 1996, S.E. Van Bramer
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Last Updated: Monday, June 24, 1996 7:30:11 PM