I am given the structual formula for lactose
howere i have to write out the equation for the hydrolosis of lactose
is the following what is required
C12H22O11 +H2O>>> C6H12O6 +C6H12O6
all the numbers are subscript, would appreciate if someone would guide me
Since this is not my area of expertise, I searched Google under the key words "hydrolysis lactose" to get this source:
http://www.indiana.edu/~ensiweb/lessons/tp.milk3.html
I hope this helps. Thanks for asking.
Bex,
From my understanding of the question, you have to draw out the equation using structural formula i.e. draw a diagram rather than write letters and numbers. If you look at P29 of Block 9 it shows you the structural formula but for 2 glucose molecules rather than 1 galactose and 1 glucose...and it's in reverse. Just redraw that diagram using the correct molecules and the other way around. At least that's what I've done :-)
Iam looking at that diagram from left to right
do i draw the 4th and then the 3rd with the h20 in the middle
please could you help me
Hi again,
First of all I should have said look at Fig 3.11. The 2 molecules (both glucose)on the right hand side of the arrow are joined by a glycosidic link, which is the "o" highlighted in blue. This is similar to the diagram in the question except one of the molecules is glucose and the other is galactose. What you need to is... draw the structure as it is in the question, then write "+ H20" next to it, then a arrow. You then draw a similar structure to the one that that's on the left hand side of the arrow in Fig 3.11 (the one with the OHH ringed with a dashed line) except you need to make sure that one molecule is glucose and one is galactose.(The one in the book has 2 glucose, so just swap one of them with a galactose molecule)
To clarify, the hydrolysis of lactose can be represented by the following equation using structural formulas:
C12H22O11 + H2O >>> C6H12O6 + C6H12O6
In this equation, lactose (C12H22O11) is hydrolyzed by water (H2O) to form two molecules of glucose (C6H12O6).
To draw the structural formula for lactose in the equation, you can refer to the structural formula provided in the source you mentioned or in your study material. Keep in mind that lactose is a disaccharide composed of one molecule of galactose and one molecule of glucose. You can draw the galactose (C6H12O6) and glucose (C6H12O6) structures separately, and then represent the glycosidic bond between them using the appropriate structural symbol, such as an "o" highlighted in blue in the example you mentioned.
Next to the drawn structure, write "+ H2O" to indicate the presence of water in the reaction. Then, use an arrow to represent the direction of the reaction, going from the lactose and water to the two glucose molecules.
Remember to ensure that one molecule is drawn as galactose and the other as glucose, as lactose is composed of these two sugar molecules.