How Does pH Affect Enzyme Activity in Starch-Iodine Reactions?

  • Thread starter Thread starter originalr
  • Start date Start date
  • Tags Tags
    Activity Ph
AI Thread Summary
The experiment demonstrated how pH affects enzyme activity in starch-iodine reactions. The addition of NaCl resulted in a quicker reaction time, indicating that the enzyme was active and functioning optimally in that environment. The 1M HCl solution inhibited enzyme activity completely, preventing any color change, likely due to the acidic conditions denaturing the enzyme. The water solution had a slower reaction time, suggesting a less optimal pH for enzyme activity compared to NaCl. Overall, the results highlight the importance of pH in enzymatic reactions involving starch.
originalr
Messages
1
Reaction score
0
I did an experiment and i AM A FIRST YEAR STUDENT AND I NEED HELP EXPLAINING WHAT TOOK PLACE. I ADDED 1% STARCH TO THREE TEST TUBES AND THEN 1 DROP IODINE. THEN IN ONE THE TUBE I ADDED 3 DROPS OF 1M NaCl AND then to another i added 3 drops 1M HCl and then i added to the last one i added 3 drops of water. i observed that the solution with NaCl took 75 sec to turn colourless or clear , THE SOLUTION WITH 1M HCl never changed and the solution with water took 180 second to turn colorless...How do i explain what really happen.
 
Physics news on Phys.org
You're already explained what -happened- just fine.

What happened to the enzyme in each test tube?

Also, this should be in the homework forum.
 
Last edited:
And no need to shout.
 
Thread 'Confusion regarding a chemical kinetics problem'

Thread 'Confusion regarding a chemical kinetics problem'

TL;DR Summary: cannot find out error in solution proposed. [![question with rate laws][1]][1] Now the rate law for the reaction (i.e reaction rate) can be written as: $$ R= k[N_2O_5] $$ my main question is, WHAT is this reaction equal to? what I mean here is, whether $$k[N_2O_5]= -d[N_2O_5]/dt$$ or is it $$k[N_2O_5]= -1/2 \frac{d}{dt} [N_2O_5] $$ ? The latter seems to be more apt, as the reaction rate must be -1/2 (disappearance rate of N2O5), which adheres to the stoichiometry of the...
View full post »

Thread 'Prove that evolution is constant (Provide at least two arguments to support your position)'

I don't get how to argue it. i can prove: evolution is the ability to adapt, whether it's progression or regression from some point of view, so if evolution is not constant then animal generations couldn`t stay alive for a big amount of time because when climate is changing this generations die. but they dont. so evolution is constant. but its not an argument, right? how to fing arguments when i only prove it.. analytically, i guess it called that (this is indirectly related to biology, im...
View full post »

Similar threads

Calculating pH of Water After Adding HCl and NaOH
Replies
3
Views
3K
Does pH Affect Enzyme Activity in Cornstarch and Saliva?
Replies
4
Views
3K
Chemistry Understanding how to calculate pH of a buffer solution
Replies
2
Views
1K
How Can Ammonia Be Used to Adjust the pH of a Highly Acidic Solution?
Replies
11
Views
3K
How Does Adding KSCN Affect Fe3+, SCN-, and FeSCN2+ Concentrations?
Replies
2
Views
3K
Can Na2PdCl4 be used as a substitute for PdCl2 in electroless copper plating?
Replies
1
Views
3K
How Do You Find the Concentration of I- in the Iodine Clock Reaction?
Replies
3
Views
13K
How Does Le Chatelier's Principle Affect Reactions in Chlorine Water Systems?
Replies
1
Views
2K
Barium Chromate chemical equilibria
Replies
4
Views
36K
Redox Reaction of Ascorbic Acid using IO3
Replies
5
Views
13K

Hot Threads

Recent Insights

Back
Top