A.只有在 \(\rm{t}\)\(\rm{{\,\!}_{1}℃}\)时,\(\rm{NaCl}\)和\(\rm{MgSO_{4}}\)的溶解度才相等 |
B.\(\rm{t}\)\(\rm{{\,\!}_{1}~}\) \(\rm{t}\)\(\rm{{\,\!}_{2}℃}\),\(\rm{MgSO_{4}}\)的溶解度随温度升高而减小 |
C.在 \(\rm{t}\)\(\rm{{\,\!}_{2}℃}\)时,\(\rm{MgSO_{4}}\)饱和溶液的溶质质量分数最大 |
D.把\(\rm{MgSO_{4}}\)饱和溶液的温度从 \(\rm{t}\)\(\rm{{\,\!}_{3}℃}\)降至 \(\rm{t}\)\(\rm{{\,\!}_{2}℃}\)时,有晶体析出 |