No 1
The molecular mass of curcumin is C21H20O6 it contains keto and enol.
Enol molecular stricter contains alcoholic group while the keto molecular structure contains aldehyde group.
NO 1. Water treatment experiment.
Test tube A to B.
Total alkalinity.Both chemical and physical characteristic was noted since the green color change to light green and the chart value changed from 240 to 180.
Total Hardness. Both chemical and physical characteristic was noted since light orange color changed to light orange and the chart value changes from 250 to 425.
Free chlorine. Physical characteristic was observed because the yellow color remained the same and also the hart value remained the same.
Total Chlorine. Chemical properties were detected since the color changed from grey to white.
Test tube B to C.
Total alkalinity.Since the changed from light green to yellow and the chart value changed from 180 to 0 thus chemical characteristic was detected.
Total Hardness. Chemical properties were detected because the lighter orange color changed to brown and the chart value changed from 425 to 120.
Free chlorine. Both chemical and physical properties were observed since color changed from white to white yellow while the chart value remained constant.
Total Chlorine. Physical characteristic was observed since both white colors remained and the chart value remained constant.
Test tube C to D.
Total alkalinity. Physical characteristics were observed since the yellow color remained the same and the chart value also remained the same.
Total Hardness. Physical characteristics were observed since the brown color remained and the chart value also remained.
Free chlorine. Both chemical characteristics were obtained since the color changed from white yellow to yellow while the chart value was constant.
Total Chlorine. Physical properties were observed since the white color remained and the chart value remaining the same.
Test tube D to E.
Total alkalinity. Physical characteristic was observed since the yellow color remained and the chart value also remained.
Total Hardness. Physical characteristic was observed since the brown color remained while the chart value also remained at 120.
Free chlorine. Chemical properties were observed since the color changed from white to purple while the chart value changed from 0 to 10.
Total Chlorine. Chemical characteristic was observed because the color changed from white to light purple and the chart value changed from 0 to 1.
Test tube E to F.
Total alkalinity. Both chemical and physical characteristic was noted since yellow color changed to light yellow while the chart value remained at 0.
Total Hardness. Both chemical and physical properties were observed since the brown color turned to light brown while the chart value remained 120.
Free chlorine. Chemical characteristic was detected since the color changed from purple to white and the chart value changed from 10 to 0.
Total Chlorine. Chemical characteristics were observed since the light purple changed to white and the chart value changed from 1 to 0.
No 3.
Acidic solution. When the hydrogen ions exceed the hydroxide ions the solution becomes acidic.
Neutral solution. It contains equal concentrations of hydrogen ions and hydroxide ions.
Basic solution. When the hydroxide ions are more than hydrogen ions.
No 4.
A
The volume remained the same 10.0ml because the mole ratio is also the same. When the reacting ration is the same the volume is also the same.
B
When the unknown acid is diprotic it means that the ratio changes to the ratio of 2.This double the volume of the reaction for neutralization to occur giving out 20.0ml.
C.
If the unknown acid is triprotic the reaction ration becomes 3 thus tripling the reacting volume to 30.0ml for equal neutralization to occur.