In a reversible chemical reaction at equilibrium, if the concentration of any one of the reactants is doubled, then the equilibrium constant will
also be doubled
be halved
remain the same
become one–fourth
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In aqueous solution the ionisation constants for carbonic acid are K1 = 4.2 × 10–7 and K2 = 4.8 × 10–11. Select the correct statement for a saturated 0.034 M solution of the carbonic acid.