一道英语化学题The Ka of HF is 6.8 x 10−4.An aqueous solution contains equimolar amounts of the weak acid HF and sodium fluoride.The pH of the solution is1.less than 72.equal to 73.greater than 7

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一道英语化学题The Ka of HF is 6.8 x 10−4.An aqueous solution contains equimolar amounts of the weak acid HF and sodium fluoride.The pH of the solution is1.less than 72.equal to 73.greater than 7
一道英语化学题
The Ka of HF is 6.8 x 10−4.An aqueous solution contains equimolar amounts of the weak acid HF and sodium fluoride.The pH of the solution is
1.less than 7
2.equal to 7
3.greater than 7

一道英语化学题The Ka of HF is 6.8 x 10−4.An aqueous solution contains equimolar amounts of the weak acid HF and sodium fluoride.The pH of the solution is1.less than 72.equal to 73.greater than 7
氟化氢的Ka值是6.8 x 10−4.一种水溶液中含有等摩尔量的HF和NaF,请问该溶液的pH值是?
呃,没计算,不过因为浓度相等,所以pH=pKa,所以是酸性.（共轭酸碱,按照缓冲溶液来计算）

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