First question was easy
The heat position is under solid and postion of water is inside tube
Purpose of ice is to condense water vapour
Test on purity was boiling or melting point of water( 100 C , 0 C )
Second question
Variable to be constant was volume of HCL or temperature or time intervals or apparatus
Connect points in best fit line leaving two close points
Why not all points on same line because mistakes while taking time and inaccuracy in taking volume of sodium thiosulfate
As temperture increase, molecules gain more KE so more sucessful collisons rising up rate
The other graph will steeper ( above) line best fit
Third question
Chromotraphy
water
B was bese line
The conclusions were C has 4 sweet and D has 3 sweets. Both has one identical sweet and others are different of varying solubiles
Fourth question
The differences reading were 32 and 16
oxygen gas
Purple to pink
No need for indicator because potassium managette will change by itself
Volume in Exp 1 is double of in Exp 2
Liquid in experiment 2 is double of concentration of in experiment 1
8 because half volume of hydrogen peroxide
Adv, of measuring cylinder is quick and disadv. is not accurate as burette
Fifth question ( hardest question )
Colorless solution
No obesrevational change
Yellow precipate is formed
Hydrocarbon and alkane
Sixth question
Calculate the difference between volumes given
Plot points and draw increasing line then plateau
5 CUBIC CENTIMETERS
Last question
Bring pH meter and reading will be 13 ( or use universal indicator giving its color)
Fizzing drinks have acids which react with it giving chlroine which is toxic
To clean it from acids and other things
Apporach damp red limtus paper and result it bleaches
These are the accurate answers which will be likely similar to mark scheme
I had only lost 2 marks
The heat position is under solid and postion of water is inside tube
Purpose of ice is to condense water vapour
Test on purity was boiling or melting point of water( 100 C , 0 C )
Second question
Variable to be constant was volume of HCL or temperature or time intervals or apparatus
Connect points in best fit line leaving two close points
Why not all points on same line because mistakes while taking time and inaccuracy in taking volume of sodium thiosulfate
As temperture increase, molecules gain more KE so more sucessful collisons rising up rate
The other graph will steeper ( above) line best fit
Third question
Chromotraphy
water
B was bese line
The conclusions were C has 4 sweet and D has 3 sweets. Both has one identical sweet and others are different of varying solubiles
Fourth question
The differences reading were 32 and 16
oxygen gas
Purple to pink
No need for indicator because potassium managette will change by itself
Volume in Exp 1 is double of in Exp 2
Liquid in experiment 2 is double of concentration of in experiment 1
8 because half volume of hydrogen peroxide
Adv, of measuring cylinder is quick and disadv. is not accurate as burette
Fifth question ( hardest question )
Colorless solution
No obesrevational change
Yellow precipate is formed
Hydrocarbon and alkane
Sixth question
Calculate the difference between volumes given
Plot points and draw increasing line then plateau
5 CUBIC CENTIMETERS
Last question
Bring pH meter and reading will be 13 ( or use universal indicator giving its color)
Fizzing drinks have acids which react with it giving chlroine which is toxic
To clean it from acids and other things
Apporach damp red limtus paper and result it bleaches
These are the accurate answers which will be likely similar to mark scheme
I had only lost 2 marks
) ...it will be right ??
