An experiment was carried out in which red blood cells were put in salt solutions of different concentrations. The table below shows the percentage of...

      

An experiment was carried out in which red blood cells were put in salt solutions of different concentrations. The table below shows the percentage of cells which were destroyed by haemolysis in different salt concentration.
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(a) Draw a graph of percentage of red blood cells haemolysed against salt concentration.
(b) Explain haemolysis of red blood cells.
(c) From the graph, state:
(i) the salt concentration at which 50% red blood cells were haemolysed.
(ii) the highest salt concentration when the largest number of red blood cells were haemolysed.
(d) (i) Suggest the normal salt concentration in the blood of the mammal from which the red blood cells were obtained.
(ii) Give a reason for your answer in (d) (i) above.

  

Answers


sharon
a)52720191552.png
b) Haemolysis of red blood cells occurs when they are placed in a hypotonic solution;they gain a lot of water; swell an then burst;
(c)(i) 4.1 g/dm3; + 0.1;
(ii) 3.0 g/dm3; + 1;
(d)(i) 4.7 g / dm 3 + 0.1;
(ii) At 4.7 g / dm 3 salt concentration; as there is no haemolysis / haemolysis was zero;
sharon kalunda answered the question on May 27, 2019 at 12:56


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