WorksheetsSolvay G!
Total questions: 16
Worksheet time: 10mins
What is the most improtant product of the Solvay Process
sodium hydrogen carbonate
ammonia
sodium carbonate
calcium chloride
Whys is calcium chloride considered a waste
It has no uses at all
It has to be disposed of
It can't be recylced in the Solvay product
Too much is produced for the Australian market
Wastes produced in the Solvay Process include:
ammonia, calcium chloride
heat, calcium chloride
ammonia, heat
only calcium chloride
Which chemical associated with the Solvay process can be used as a drying agent and for de-icing roads
ammonia
brine
calcium chloride
calcium carbonate
Which is the best justification for dumping calcium chloride waste into the ocean
Carbonate ions in the ocean can remove excess calcium ions and hydrogen carbonate deals with residual alkali in the waste
The oceans naturally contain calcium and chloride ions and the amount of waste dumped does not greatly alter their concentrations
It is convenient
It is cheaper than evaporating to dryness and burying
Which ions need to be removed from brine in order to purify it?
sodium and magnesium
calcium and sodium
magnesium and calcium
sodium magnesium and calcium
Ammonia may be lost from the Solvay plant due to leaks in the
ammonia saturator and ammonia recovery unit
ammonia saturator, ammonia recovery unit and carbonating tower
nowhere as it is monitored closely
only the ammonia saturator as this is where the greatest pressure of ammonia is needed
Which of the following are not uses of sodium carbonate
glass making and making fertilisers
making baking soda and soap
making paper and removing sulfur dioxide from flu gases in power stations
treating water and replacing sodium hydroxide in industrial processes
The reason why waste heat is produced in the Solvay Process is
the overall process in close to thermally neutral (Delta H approx 0)
Some of the steps in the process are exothermic
The Solvay process is endothermic - large amounts of heat are used in the lime kiln and the ammonia recovery tower
It is not possible to capture all of the heat produced in the Solvay Process and use it for the endothemic reactions involved
Both carbonate and hydroxide ions are used to purify brine because
calcium carbonate is slightly soluble while calcium hydroxide is not
magensium carbonate is slightly soluble while magnsium hydroxide hydroxide is not
calcium carbonate is insoluble while magnesium hydroxide is soluble
Calcium carbonate and magesium hydroxide are insoluble
Ammonia is not considered a catalyst in the Solvay Process
Because it is not recycled
Because the Solvay process does not occur in one step
Because it has to be recovered
It does not lower the activitation energy of the conversion of sodium chloride to sodium carbonate - it is part of a cyclic process utilising a number of distinct reactions it which is consumed in one reaction and produced in a separate process to be recovered and recycled
The industrially significant product in the Solvay Process is
washing soda
anhydrous sodium carbonate
sodium carbonate decahydrate
sodium hydrogen carbonate
The Solvay Plant near Adelaide is well situated because
It has ready access to the sea and a port
The Ghan is close by
It is close to salt lakes in the desert where it can access soidium chloride
The nearby desert regions are uninhabited so waste calcium chloride can be easily and safely disposed of by burial
Ammonia is used in the Solvay Process even though it is expensive because
You can't directly convert sodium chloride to sodium carbonate - so you need an alternative pathway
You could possibly produce ammonium chloride instead of calcium chlorde and then use this as a byproduct of the Solvay Process and use it as a fertilizer
It is recycled so you don't have to keep replacing it
All of the above
Location of the Solvay plant needs considerable thought because
prevailing winds could blow ammonia leaks onto nearby towns
large water bodies need to be located nearby so that significant thermal pollution does not become a problem to ecosystems
Large distances to resources adds to energy consumption which lowers cost margins and contributes to greenhouse gas emissions
All of the above
For every tonne of dry sodium hydrogen carbonate which is produced by the Solvay Process, what mass of ammonia is fed back into the saturator? Give the answer to the correct number of significant figures
1 tonne
0.2 tonne
0.202 tonne
0.4 tonne
