potato required practical

• 1. use of a cork to cut out three cylinders from a potato
• 2. cut of the ends and use a ruler to make sure theyre all equal length.
• 3. record length on a a results table
• 4. measure the weight using mass balance
• 5. put one potato cylinder in a boiling tube
• 6. use a measuring cylinder to measure 10 ml of distilled water
• 7. pour in the boiling tube and label it distilled water
• 8. then repeat using 0.25 mol of sucrose and 0.5 mol of sucrose in seperate boiling tubes all need to be 10 ml
• 9. leave it for some time ( the longer the more accurate)
• 10. take out the potato using a sieve pouring out he water in the sink
• 11. roll potato on a kitchen towel to get rid of excess moisture (not too much bc it can suck out water from the potato)
• 12. measure the new length with a ruler
• 13. measure new mass with mass balance.
• 14. record your results and the change. (difference)
• 15. calculate the percentage mass: %change = change/initial amount.
• • control variable - the amount of solution that is added to the test tube
• independent variable - the concentration of sucrose
• dependent variable - the rate of osmosis