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【題目】學習溶液的知識后,可以幫助我們正確認識溶液的組成及物質的溶解過程,下表是幾位同學對溶液的錯誤認識,請你用熟悉的實例來否定其觀點.

序號

錯誤觀點

否定實例

(1)

溶液一定是無色的

(2)

均一、穩定的液體一定是溶液

(3)

溶液中的溶劑一定是水

(4)

一種溶劑最多溶解一種溶質

(5)

兩種液體混合后充分振蕩,一定得到溶液

【答案】(1)硫酸銅溶液是藍色的 (2)水是均一、穩定的液體,但水不是溶液 (3)碘酒中酒精是溶劑 (4)在海水中有食鹽、氯化鎂等多種溶質 (5)把植物油放入水中充分振蕩后,形成乳濁液

【解析】本題考查對溶液的概念、組成、特征、性質的認識.從溶液的定義看,只有一種或幾種物質分散到另一種物質中形成均一、穩定的混合物才是溶液,即溶液中,溶質可以是一種,也可以是多種,可以是固體、液體、氣體中的任意一種;溶劑也不一定是水;溶液具有均一、穩定性,但不一定是無色的;溶液一定是混合物.

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