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C10: Quiz 4
C10: Quiz 4
1)
a) What is potable water?
b) Is potable water pure water? Explain your answer.
c) What is the pH range for potable water?
2)
a) Fresh water can be found as surface water or ground water. What are the three different places where surface water can be found?
b) Out of surface water and ground water, where is the majority of potable water obtained from in the south of England?
c) Out of surface water and ground water, where is the majority of potable water obtained from in the North of England and Scotland?
3) This question is all about treating fresh water (surface water or ground water).
a) The first step in treating fresh water is to filter it.
i) The first part of the filtration process involves letting the water pass through a wire mesh, which is known as a screen. Why do we do this?
ii) After the water has passed through the screen, it passes through a filter bed. Why does this happen?
b) After the water has gone through both of the filtration stages, it is sterilised.
i) Why do we sterilise the water?
ii) Give the three ways that we can sterilise the water.
c) Is the process of obtaining potable water from fresh water relatively cheap or relatively expensive?
4) We can obtain potable water from sea water in two different ways.
a) Give the names of these 2 different ways to obtain potable water from sea water.
b) Are these 2 methods of obtaining potable water from sea water relatively cheap or relatively expensive?
c) Why would a country choose to obtain potable water from sea water rather than from fresh water?
5) We can undertake a distillation experiment in a lab to obtain potable water from sea water.
a) Draw a sketch for the setup of this experiment and label all of the different pieces of apparatus.
b) Before we use the apparatus to obtain potable water, what must we check regarding the water?
c) Describe how the apparatus that you have drawn in part a can be used to obtain potable water.
d) Where will the salt and other impurities in the sea water be left?
6)
a) Give one positive of using distillation on an industrial scale to obtain potable water.
b) Give two negatives of using distillation on an industrial scale to obtain potable water.
7) Another way that we can obtain potable water from sea water is to do reverse osmosis.
a) Explain the steps involved in reverse osmosis.
b) Give 2 negatives of reverse osmosis.
a) What is potable water?
b) Is potable water pure water? Explain your answer.
c) What is the pH range for potable water?
2)
a) Fresh water can be found as surface water or ground water. What are the three different places where surface water can be found?
b) Out of surface water and ground water, where is the majority of potable water obtained from in the south of England?
c) Out of surface water and ground water, where is the majority of potable water obtained from in the North of England and Scotland?
3) This question is all about treating fresh water (surface water or ground water).
a) The first step in treating fresh water is to filter it.
i) The first part of the filtration process involves letting the water pass through a wire mesh, which is known as a screen. Why do we do this?
ii) After the water has passed through the screen, it passes through a filter bed. Why does this happen?
b) After the water has gone through both of the filtration stages, it is sterilised.
i) Why do we sterilise the water?
ii) Give the three ways that we can sterilise the water.
c) Is the process of obtaining potable water from fresh water relatively cheap or relatively expensive?
4) We can obtain potable water from sea water in two different ways.
a) Give the names of these 2 different ways to obtain potable water from sea water.
b) Are these 2 methods of obtaining potable water from sea water relatively cheap or relatively expensive?
c) Why would a country choose to obtain potable water from sea water rather than from fresh water?
5) We can undertake a distillation experiment in a lab to obtain potable water from sea water.
a) Draw a sketch for the setup of this experiment and label all of the different pieces of apparatus.
b) Before we use the apparatus to obtain potable water, what must we check regarding the water?
c) Describe how the apparatus that you have drawn in part a can be used to obtain potable water.
d) Where will the salt and other impurities in the sea water be left?
6)
a) Give one positive of using distillation on an industrial scale to obtain potable water.
b) Give two negatives of using distillation on an industrial scale to obtain potable water.
7) Another way that we can obtain potable water from sea water is to do reverse osmosis.
a) Explain the steps involved in reverse osmosis.
b) Give 2 negatives of reverse osmosis.