第 1 題
1 分How can the purity of a solid substance be reliably assessed by physical testing?
GCE O-Level · Chemistry (6092)
Methods of Purification and Analysis：練習題
5 條多項選擇題即時批改，另有 2 條文字題附完整解題步驟，全部圍繞「Methods of Purification and Analysis」。
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第 2 題
1 分In a paper chromatography experiment, the solvent front traveled \(15.0 \text{ cm}\) from the baseline. A dye spot moved \(6.0 \text{ cm}\) from the baseline. What is the \(R_f\) value of this dye?
第 3 題
1 分A solid mixture contains three substances: ammonium chloride, sodium chloride, and sand. Which sequence of steps successfully separates all three pure substances?
第 4 題
1 分A student is provided with a heterogeneous mixture of sand and water. Which method of separation should be used to obtain dry sand?
第 5 題
1 分A solid organic substance is suspected to be impure. Which observation during a melting point determination best confirms that the substance is impure?
第 6 題
2 分What is the effect of a soluble impurity on the melting point and boiling point of a pure substance?
先自己寫一次答案，再對照解題步驟。
第 7 題
2 分Which separation technique is most suitable to separate a mixture of two miscible liquids with significantly different boiling points?
先自己寫一次答案，再對照解題步驟。
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