If you need for sugar (glucose) -
O
C-H
|
H- C-OH
|
OH- C-H + Cu (complex)2+ +2 OH- ----->
|
H-C-OH
|
H-C-OH
|
CH2OH
O
C- O-
|
H- C-OH
|
OH- C-H + Cu2O (precipitate)
|
H-C-OH
|
H-C-OH
|
CH2OH
Sugar + Alkali -------> enediols
CuSO4 -------> Cu++ and SO4--
Enediols + Cu++ --------> Cu+
Cu+ and OH- --------> CuOH heat -----> CuO (ppt) qualitative
Cu+ and OH- ---------> CuOH heat+SCN --------> CuSCN (white ppt)Quantitative
CuSO4 (cupric ions) + reducing substance => Cu2O (cuprous ions) + oxidized substance
benedicts solution is a mixture of sodium carbonate,trisodium citrate dihydrate and copper sulphate pentahydrate.
R-CHO + 2Cu2+ + 4OH- ----------> R-COOH + Cu2O + 2H2O
where R is the group attached to the aldehyde (CHO)
See the link below.
R-CHO + 2Cu2+ + 4OH- ----------> R-COOH + Cu2O + 2H2O where R is the group attached to the aldehyde (CHO)
benedicts test
wrt
benedicts test
equation involved in nylander's test using fructose
R-CHO + 2Cu2+ + 4OH- ----------> R-COOH + Cu2O + 2H2O where R is the group attached to the aldehyde (CHO)
benedicts test
wrt
benedicts test
yes
Most chemical supply companies sell it. You can do an internet search for "retail sale of Benedicts solution".
penis
prosrdure of benidect solution test
equation involved in nylander's test using fructose
It is normally benedicts solution. Add about 1/4 of the total sugar solution to a test tube and heat it in a hot water bath at around 50 degrees C for 5 min. For example, heat 40mL of sugar water (C12H22O11 aq ) with 10mL of Benedicts soluton (copper and sodium salts). If it is a positive test it will turn yellow.
yes.
Turns blue black