A mass of 2.5g of acid HX was dissolved in water and the resulting solution was diluted to a total of 250cm3, 15cm3 of the final solution was required to neutralize 25.0cm3 of 0.1M aqueous potassium hydroxide. Calculate the relative molecular mass of the acid (3mks)
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a) How do their rate of diffusion compare? (2mks)b) Determine the relative molecular mass of X given that the relative molecular mass of Y is 64 (1mk)a) Sugar crystals. (1mk)
b) Hydrated copper (II) sulphate solution (1mk)
c) What type of reaction has taken place above (1mk)
A fixed mass of an ideal gas occupies 200cm3 at a pressure of 740 mmHga) State Charles’s law (1mk)
b) Calculate the volume of the gas at 77-mmHg pressure (2mks)Alkaline earth metals are generally less reactive than alkali metals, explain.Alkaline earth metals loses two electrons while alkali metal lose one electron.
Ammonia gas is prepared by Haber process according to the equation belowN2(g) + 3H2(g) 2NH3(g) + HeatComplete the table below by stating the effect of equilibrium when the following conditions are applied. Give explanation in each caseSolutiona) Explain why sulphur is soluble in ethanol but hot in water (1mk)
b) Explain how a pure sample of sodium chloride can be obtained from a mixture of the two (1mk)
Explain why potassium is kept under paraffin while phosphorous is kept under waterPotassium does not react with paraffin but react with water while phosphorous react with paraffin but does not react with water
a) Identify the solids
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Molten M | Conduct electric current and is not decomposed |
Molten N | Conduct electric current and a gas is formed at one of the electrodes |
Suggest the type of bonding present in;
a) Substance M (1mk)
Metallic bond
b) Substance N (1mk)
Ionic bond
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