Dilute nitric acid reacts with sodium carbonate solution. 2HNO3 (aq) + Na2CO3 (aq) → 2NaNO3 (aq) + H2O (l) + CO2 (g) 25.00 cm3 of sodium carbonate solution of concentration 0.153 mol/dm3 reacts completely with 25.3 cm3 of dilute nitric acid. a) Calculate the number of moles of sodium carbonate.

b) Use your answer to (a) and the equation for the reaction to calculate the number of moles of nitric acid that reacted.

c) Use your answer to (b) to calculate the concentration of dilute nitric acid in mol/dm3.

d) Use your answer to (a), calculate the maximum volume (at r. t.p.) of carbon dioxide gas that could be produced in this reaction.

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adding or remove a gaseous reactant or product changes the concentrations. if the concentration of reactant or product is increased, the system will shift away from the side in which concentration was increased (i.e. if the concentration of reactants is increased, the system will shift toward the products. if more products are added, the system will shift to form more reactants). conversely, if the concentration of reactant or product is decreased, the system will shift toward the side in which concentration was decreased (i.e. if reactants are removed, the system will shift to form more reactants. if the concentration of products is decreased, the equilibrium will shift toward the products).

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