PLeASe HeLP?

PLeASe HeLP Me ANSWeR THeSe CHeM QUeSTIONS?





1.Sodium hydrogencarbonate (NaHCO3) is used in cooking as a raising agent – often with potassium hydrogen tartrate which is acidic.





a)Name the gas released which causes cakes to rise.





b)Explain, with the aid of an ionic equation, how this gas is produced.





2.Soap is made from a reaction between sodium hydroxide and fats or oils.


Explain why bases generally feel slippery on the skin.





3.Oxides of non-metals are acidic. Oxides of metals are basic.





a)Explain, with the aid of an equation, why a solution of rainwater has a pH of 6.





b)Acid rain has a pH of %26lt; 5.6. It forms when gases such as SO3 are present in the atmosphere.


i)Name the acid which forms when SO3 dissolves in water (rain, lakes, rivers).


ii)Write an equation for the formation of this acid.


iii)With the aid of equations, explain the effects of acid rain on:


1.marble buildings – marble is calcium carbonate


2.iron railway lines





Thanks Muchly!!!

PLeASe HeLP?
The gas released is CO2





Soaps feel slippery because bases denature proteins on skin surface which changes the way they feel