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Tutorial/Assignment
Water
1. Explain the significance of water in life
2. Describe briefly the physical and chemical properties of water
3. Explain why the molecul of water is classified as polar ?
4. What is hydrogen bonding ?
5. Explain why water has a high boiling point compared to ammonia and
alcohol
6. Explain the term : osmosis, osmotic pressure, and reverse osmosis
7. Explain why red blood cells undergo haemolysis when they are immersed
in pure water.
8. Based on the equilibrium constant for the reversible ionization of water (
1.8 X 10~16 M) , prove that the pH at normal temperature is 7
9. Calculate the pH of a mixture of 0.10 M acetic acid and 0.20 M sodium
acetate. The pKa of acetic acid is 4.76.
10.Calculate the ratio of the concentrations of acetate and acetic acid
required in a buffer system of pH 5.30.
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