设水有1升,氯化氢就有700升
就有：氯化氢物质的量为700/22.4mol,质量为36.5*700/22.4g,溶液总质量为(36.5*700/22.4+1000)g,溶液体积为(36.5*700/22.4+1000)/1000p,所得溶液的物质的量浓度就是700/22.4÷(36.5*700/22.4+1000)/1000p=7000p/（36.5*7+224）=14.6p mol/L