So, pure liquids and solids actually are involved, but since their activities are equal to 1, they don't change the equilibrium constant and so are often left out. Then substitute values from the table to solve for the change in concentration (\(x). A large equilibrium constant implies that the reactants are converted almost entirely to products, so we can assume that the reaction proceeds 100% to completion. A \([CO_2]_i = 0.632\; M\) and \([H_2]_i = 0.570\; M\). In contrast to Example \(\PageIndex{3}\), however, there is no obvious way to simplify this expression. Check your answers by substituting these values into the equilibrium equation. start text, a, A, end text, plus, start text, b, B, end text, \rightleftharpoons, start text, c, C, end text, plus, start text, d, D, end text, K, start subscript, start text, c, end text, end subscript, K, start subscript, start text, e, q, end text, end subscript, K, start subscript, start text, c, end text, end subscript, equals, start fraction, open bracket, start text, C, close bracket, end text, start superscript, start text, c, end text, end superscript, start text, open bracket, D, close bracket, end text, start superscript, start text, d, end text, end superscript, divided by, open bracket, start text, A, end text, close bracket, start superscript, start text, a, end text, end superscript, open bracket, start text, B, end text, close bracket, start superscript, start text, b, end text, end superscript, end fraction, start text, N, O, end text, start subscript, 2, end subscript, start text, N, end text, start subscript, 2, end subscript, start text, O, end text, start subscript, 4, end subscript, start text, N, end text, start subscript, 2, end subscript, start text, O, end text, start subscript, 4, end subscript, left parenthesis, g, right parenthesis, \rightleftharpoons, 2, start text, N, O, end text, start subscript, 2, end subscript, left parenthesis, g, right parenthesis, start text, N, end text, start subscript, 2, end subscript, start text, O, end text, start subscript, 4, end subscript, left parenthesis, g, right parenthesis, start fraction, start text, m, o, l, end text, divided by, start text, L, end text, end fraction, open bracket, start text, C, close bracket, end text, start text, open bracket, D, close bracket, end text, open bracket, start text, A, end text, close bracket, open bracket, start text, B, end text, close bracket, K, start subscript, start text, p, end text, end subscript, 2, start text, S, O, end text, start subscript, 2, end subscript, left parenthesis, g, right parenthesis, plus, start text, O, end text, start subscript, 2, end subscript, left parenthesis, g, right parenthesis, \rightleftharpoons, 2, start text, S, O, end text, start subscript, 3, end subscript, left parenthesis, g, right parenthesis, K, start subscript, start text, c, end text, end subscript, equals, start fraction, open bracket, start text, S, O, end text, start subscript, 3, end subscript, close bracket, squared, divided by, open bracket, start text, S, O, end text, start subscript, 2, end subscript, close bracket, squared, open bracket, start text, O, end text, start subscript, 2, end subscript, close bracket, end fraction, K, start subscript, start text, c, end text, end subscript, equals, 4, point, 3, Q, equals, start fraction, open bracket, start text, S, O, end text, start subscript, 3, end subscript, close bracket, squared, divided by, open bracket, start text, S, O, end text, start subscript, 2, end subscript, close bracket, squared, open bracket, start text, O, end text, start subscript, 2, end subscript, close bracket, end fraction, Q, equals, K, start subscript, start text, c, end text, end subscript, start text, N, end text, start subscript, 2, end subscript, start text, O, end text, start subscript, 2, end subscript, start text, N, end text, start subscript, 2, end subscript, left parenthesis, g, right parenthesis, plus, start text, O, end text, start subscript, 2, end subscript, left parenthesis, g, right parenthesis, \rightleftharpoons, 2, start text, N, O, end text, left parenthesis, g, right parenthesis, K, start subscript, start text, c, end text, end subscript, equals, start fraction, start text, open bracket, N, O, end text, close bracket, squared, divided by, open bracket, start text, N, end text, start subscript, 2, end subscript, close bracket, open bracket, start text, O, end text, start subscript, 2, end subscript, close bracket, end fraction, 3, point, 4, times, 10, start superscript, minus, 21, end superscript, open bracket, start text, N, end text, start subscript, 2, end subscript, close bracket, equals, open bracket, start text, O, end text, start subscript, 2, end subscript, close bracket, equals, 0, point, 1, start text, M, end text, start text, N, O, end text, left parenthesis, g, right parenthesis, K, start subscript, start text, c, end text, end subscript, equals, start fraction, start text, open bracket, N, O, end text, close bracket, squared, divided by, open bracket, start text, N, end text, start subscript, 2, end subscript, close bracket, open bracket, start text, O, end text, start subscript, 2, end subscript, close bracket, end fraction, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, space, start text, G, e, t, space, t, h, e, space, N, O, space, t, e, r, m, space, b, y, space, i, t, s, e, l, f, space, o, n, space, o, n, e, space, s, i, d, e, point, end text.
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