S1 Ch4 Microfiltration, Reverse osmosis & seawater

In microfiltration, what does the membrane trap?

Select the statement(s) if they are TRUE.

• Microfiltration uses a membrane

• In microfiltration, there is a high pressure

• After microfiltration, the water is pure.

• We are able to see microorganisms with our eyes.

Which particles would be in the filtrate after filtration?

• A & B

• A & D

• B & E

• D & E

Which particles would be in the residue after filtration?

• A & B

• A & D

• B & E

• D & E

What is the name of part C?

A partially permeable membrane would allow ____________ to pass through it.

• everything

• nothing

• particles larger than the pore

• particles smaller than the pore

Select the statement(s) if it is TRUE

• Reverse osmosis does not require a partially permeable membrane.

• dissolved salts are removed after reverse osmosis

• a high pressure is needed for reverse osmosis

• the purified water has chemical molecules left

How much of the earth's surface is water?

Select the statement(s) that are TRUE

• Less than 1% of the earth's water is drinkable naturally.

• Water is an infinite resource

• Seawater is drinkable.

• Singapore has a desalination plant and a NEWater plant

Desalination is the removal of what substance from water?