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SMUDGY
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I need to plan an investigation to find out how changes in the consumption of protein in the diet influence the excretion of urea in humans.
it is possible to determine the urea concentration in urine using the enzyme urease which catalyses the following reaction:
Urea+Water --> (with urease on top of arrow) --> Ammonium Carbonate
Ammonium carbonate has an alkaline ph.
Urease breaks down urea, the pH of the reaction mixture changes. Change can be shown by pH indicator. If reaction goes to completion the concentration of ammonium carbonate can be found by titrating against 0.1 mol dm-3 HCL. Volume of HCL used is an estimate of concentration of urea in original solution.
How would i use determine the urea concentration when using urease
This plan needs to be based on materials provided which are:
10g per 100cm3 (10%) solution of urea
urease tablets or 5g per 100cm3 (5%) solution of urease
0.1 mol dm-3 HCL
pH indicators
School lab resources
What apparatus would i use
what is a possible method
it is possible to determine the urea concentration in urine using the enzyme urease which catalyses the following reaction:
Urea+Water --> (with urease on top of arrow) --> Ammonium Carbonate
Ammonium carbonate has an alkaline ph.
Urease breaks down urea, the pH of the reaction mixture changes. Change can be shown by pH indicator. If reaction goes to completion the concentration of ammonium carbonate can be found by titrating against 0.1 mol dm-3 HCL. Volume of HCL used is an estimate of concentration of urea in original solution.
How would i use determine the urea concentration when using urease
This plan needs to be based on materials provided which are:
10g per 100cm3 (10%) solution of urea
urease tablets or 5g per 100cm3 (5%) solution of urease
0.1 mol dm-3 HCL
pH indicators
School lab resources
What apparatus would i use
what is a possible method