根据如表回答问题.
温度\(\rm{(℃)}\) | \(\rm{20}\) | \(\rm{40}\) | \(\rm{50}\) | \(\rm{60}\) | \(\rm{80}\) |
溶解度\(\rm{(g/100g}\)水\(\rm{)}\) | \(\rm{NaCl}\) | \(\rm{36.0}\) | \(\rm{36.6}\) | \(\rm{37.0}\) | \(\rm{37.3}\) | \(\rm{38.4}\) |
\(\rm{NH_{4}Cl}\) | \(\rm{37.2}\) | \(\rm{45.8}\) | \(\rm{50.4}\) | \(\rm{55.2}\) | \(\rm{65.6}\) |
\(\rm{KNO_{3}}\) | \(\rm{31.6}\) | \(\rm{63.9}\) | \(\rm{85.5}\) | \(\rm{110}\) | \(\rm{169}\) |
\(\rm{①20℃}\)时,溶解度最大的物质是 ______
\(\rm{②50℃}\)时,\(\rm{100g}\)水中最多溶解\(\rm{NaCl}\) ______ \(\rm{g}\)
\(\rm{③}\)量筒的局部示意见图,量取水时应沿 ______ 视线\(\rm{(}\)选填“\(\rm{a}\)”或“\(\rm{b}\)”\(\rm{)}\)进行读数, ______ 视线\(\rm{(}\)选填“\(\rm{a}\)”或“\(\rm{b}\)”\(\rm{)}\)对应的读数较大.
\(\rm{④A}\)是\(\rm{80℃}\)含有\(\rm{120g}\)水的\(\rm{KNO_{3}}\)溶液,经过如下操作,得到\(\rm{102gKNO_{3}}\)固体.
Ⅰ\(\rm{.A}\)溶液为 ______ \(\rm{(}\)选填“饱和”或“不饱和”\(\rm{)}\)溶液
Ⅱ\(\rm{.}\)对以上过程的分析,正确的是 ______ \(\rm{(}\)选填编号\(\rm{)}\)
\(\rm{a.A}\)到\(\rm{B}\)的过程中,溶质质量没有改变
\(\rm{b.B}\)中溶质与溶剂的质量比为\(\rm{169}\):\(\rm{100}\)
\(\rm{c.}\)开始析出\(\rm{KNO_{3}}\)固体的温度在\(\rm{60℃}\)至\(\rm{80℃}\)之间
\(\rm{d.A}\)溶液的质量等于\(\rm{222g}\).