What do humans use resources for?
Which one of the following objects that you use all the time comes from a renewable resource?
Tick one
What are finite resources?
Match each type of water to the correct example.
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Wastewater | arrow_right_alt | |
Pure | arrow_right_alt | |
Freshwaer | arrow_right_alt | |
Seawater | arrow_right_alt |
Sam is preparing to analyse a chemical sample by first dissolving it in water. They reckon tap water will be okay to use because it is potable. Is Sam correct? Explain your answer.
Match each description to the correct type of water.
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
used water from homes, factories and agriculture | arrow_right_alt | Freshwater |
Composed of only H2O molecules | arrow_right_alt | Waste water |
Contains high amounts of dissolved substances | arrow_right_alt | Pure |
found in lakes, rivers, reservoirs and glaciers | arrow_right_alt | Seawater |
Match each description to the correct step name.
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Screening | arrow_right_alt | Removes very small, insoluble particles |
Sedimentation | arrow_right_alt | A grid acts like a sieve, removing large and insoluble objects |
Filtration | arrow_right_alt | Kills bacteria and other microbes |
Sterilisation | arrow_right_alt | Small, insoluble particles settle out of the water source |
Put each step into the correct order to form potable water from groundwater or freshwater.
Filtration
Sterilisation
Screening
Sedimentation
Izzy has written some instructions for how dirty water could be ‘cleaned’ using common laboratory equipment.
Read through Izzy’s apparatus and method. Correct any mistakes you find.
Place appropriate statements on the Venn diagram.
Pressure
Pure Water
Boil
Seawater
Partially Permeable Membrane
Condensation
Desalination
Filtration
Freshwater
Temperature
Distillation
Reverse Osmosis
Both
Neither
Many factors are considered when determining which method to use to obtain potable water from a source.
a)What are the advantages and disadvantages of using distillation to obtain drinking water from seawater?
b)Why is distillation not used to provide drinking water in the UK?
Match each description to the correct type of water.
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
only falls from the sky | arrow_right_alt | Groundwater |
oceans | arrow_right_alt | Pure water |
H2O only | arrow_right_alt | Rainwater |
moves through porous rock | arrow_right_alt | Seawater |
Place each substance below into the correct column(s) to show which soluble substances are found in each type of water. You can reuse answers
Carbon Dioxide (CO2)
Sodium Chloride (NaCl)
Sulfur Dioxide (SO2)
Dissolved Ions (Ca2+, Mg2+)
Groundwater
Rainwater
Seawater
Jun needs to determine the pH of a sample.
Write a method for how he should use universal indicator (UI) paper to complete his task.
Use the method from above to determine the pH of four water samples.
Record your results in the table below.
What equipment should be used to:
hold the water sample over boiling water?
What equipment should be used to:
measure the mass of the water sample?
What equipment should be used to:
measure the volume of the water sample?
Match each diagram to the appropriate description.
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
| arrow_right_alt | measure 5 cm3 of water sample | |
| arrow_right_alt | record the mass of the watch glass | |
| arrow_right_alt | remove condensation from watch glass | |
| arrow_right_alt | record the mass of the watch glass and dissolved solids | |
| arrow_right_alt | heat sample until dry |
Order the statements from the last question to create a method for obtaining the dissolved solids from a sample of water.
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
3 | arrow_right_alt | measure 5 cm3 of water sample |
5 | arrow_right_alt | record the mass of the watch glass |
1 | arrow_right_alt | remove condensation from watch glass |
4 | arrow_right_alt | record the mass of the watch glass and dissolved solids |
2 | arrow_right_alt | heat sample until dry |
Sofia suspects she has a pure water sample and is testing to see if it contains any dissolved substances. What should she expect to observe and why?
Sam used the following method and equipment set-up to see how much dissolved solids are in their garden pond water.
How might Sam’s investigation be improved?
Method
1.Measure 5 cm3 of pond water and pour it onto the watch glass.
2.Heat the pond water until it is dry.
3.Record the mass of the watch glass.
Follow the method from above to obtain any dissolved solids from a water sample.
A student’s results are shown in the table below.
What mass of dissolved solids would be in 250 cm3 of the same type of water?
Sofia suspected her water sample was pure and tested to see if it contained any dissolved substances. Here is a table of her results.
Sofia expected to see no dissolved solids in her sample. What may have caused her results?
5 cm3 samples of four different types of water were analysed. The results are in the table below. Put the water samples into order from the most to the least pure.
Tap water - pH 6.9 - Mass of dissolved solids = 0.002g
River Water - pH 7.4 - Mass of dissolved solids = 0.003g
Groundwater - pH 6.3 - Mass of dissolved solids = 0.004g
Seawater - pH 8.1 - Mass of dissolved solids = 0.200g
Some students investigated different water samples by heating 10 cm3 of each until dry in an evaporation dish with a mass of 94.56 g. Their results are shown in the table below.
Which sample is pure water? Explain your answer.
Which sample is seawater? Explain your answer.
Complete the diagram to show how you can distill a water sample and collect pure water.
Label the following:
●pure water
●water sample
Alex and Aisha used different distillations setups to purify 50 cm3 of impure water. They distilled their samples for the same period of time.
Explain why Alex collected a smaller volume of pure water than Aisha.
Both test the boiling point of the distillate obtained in in the last question
a)What result would you expect if the distillate:
i) is pure?
ii) is impure?
Pure water has a boiling point of
water in the seas and oceans
water in underground streams and rocks
water in underground streams and rocks, rivers, lakes, ice caps and glaciers
used water from homes, industry, and agriculture
water that is fit to drink
water that is 100% water and contains nothing else
Bottled water
Distilled water
Contains microbes and dissolved substances
Contains dissolved substances
Nothing - just water
What chemicals are used to sterilise water?
Tick 3
What is apparatus W on above the figure above?
Tick one box
What is the name of this method separation in the question before?
Tick 1 box
What is the pH of pure water
Match types of water to their characteristics.
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Potable water | arrow_right_alt | Found below the earth's surface. |
Ground water | arrow_right_alt | Contains no impurities, fully clean. |
Pure water | arrow_right_alt | Safe for drinking and cooking. |
Match steps of making potable water to reasons
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
desalination | arrow_right_alt | remove pieces of solid |
passing water through filter beds | arrow_right_alt | kill microorganisms |
sterilising | arrow_right_alt | remove dissolved salts |
Desalination can be carried out through distillation. Label the diagram below with the following labels
a. Condenser
b. Thermometer
c. Salty water is boiled
d. 100°C
e. Vapours condense
f. Flask
g. Distilled water
h. Beaker
i. Salty water
j. Steam leaves the flask
Why is desalination only carried out in wealthy countries?
How is waste water treated? Please put these in the correct order
Treat water
Return to rivers and waterways
Secondary settling tanks
Remove effluent and aerate
Primary sedimentation tanks
Screen and remove frit and particles
Decide which of these are bioleaching or phytomining
Use active transport to move metal ions from soil into roots
Extracts metals from slag heaps, contaminated ground and low grade ore
Some organisms involved use chemosynthesis to produce sugars
Combustion and displacement reactions involved
Involves bacteria
Involves plants
This process is made more efficient by controlling conditions such as pH, temperature and humidity
This method takes a long time - up to 2 years
Bioleaching
Phytomining
Give a brief description of phytomining
Disposable cups are made from coated paper or poly(styrene). The table below shows information on the life cycle assessments (LCAs) of disposable cups.
Evaluate the use of coated paper compared with poly(styrene) to make disposable cups. Use the table above and your knowledge and understanding of LCAs
Life cycle assessments are used to assess the environmental impact of producing iron nails and glass bottles.
There are four stages, A, B, C and D, in a life cycle assessment.
The stages are not in the correct order.
Stage ADisposalStage BExtracting and processing raw materialsStage CManufacturing and packagingStage DUse and operation
What is the correct order of stages A, B, C, and D?
Life cycle assessments (LCAs) are used to assess the environmental impact of different products.
212 million kilograms of aluminium is used for packaging in the UK each year.
68.0% of aluminium packaging is recycled.
Calculate the mass of aluminium packaging that is recycled in the UK each year.
Mass of aluminium recycled = ____________________ million kg
What is sacrificial protection?
Which metal is often used to galvanise iron?
Which process involves the use of electricity to prevent corrosion and improve appearance?
Rusting is a specific type of corrosion affecting _______ in the presence of water and oxygen.
Which of the following equations is not involved in the rusting process?
Complete the word equation for the rusting of iron. iron + _________ → (hydrated) iron(Ⅲ) oxide
