Osmosis Core Practical TIN

Recall the meaning of the term independent variable

• The variable that you keep the same

• The variable that you change

• Th variable that you monitor

• The variable that you measure

Recall the meaning of the term dependent variable

• The variable that you keep the same

• The variable that you change

• Th variable that you monitor

• The variable that you measure

Recall the meaning of the term control variable

• The variable that you keep the same

• The variable that you change

• Th variable that you monitor

• The variable that you measure

A low solute (sucrose) solution =

• a high water concentration

• a low water concentration

Recall two factors you must control when investigating osmosis in potatoes

• the amount of sucrose

• volume of the sucrose solution

• surface area of the potato

• the volume of water

Recall the definition of Osmosis

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Recall the definition of Osmosis

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The pieces of potato are blotted dry before they are re-weighed to remove excess ________.

Give one way in which the accuracy of results could be increased in an investigation

• Take your time to complete the investigation

• Repeat the investigation

• Repeat the investigation and calculate an average

• Do a trial run first to get all the errors out of your system

Calculate the % change in mass for Chip 6 in the table.

Give your answer to an appropriate number of decimal places.

% change in mass = (change in mass ÷ starting mass) x 100

• -27.0

• 27.03

• 27.0

• 27.03