
Concept explainers
(a)
Interpretation:
The information that is given in the statement “A liter of water, colored with a purple dye, was passed through a charcoal filter. The charcoal adsorbed the dye and colorless water came through. Later, the purple dye was removed from the charcoal and retained its color” has to be classified whether it is qualitative or quantitative and whether it relates to physical or chemical property.
Concept Introduction:
Physical properties:
The properties which are measured or observed without change in composition of matter are said to be physical properties. These includes appearance, texture, color, odour, melting point, boiling point, density, solubility, polarity and so on.
Chemical properties:
The properties that are observed when a substance undergoes any
Qualitative properties:
The measure of the quality of something rather than its quantity is said to qualitative observation. It includes size, appearance, value and so on.
Quantitative properties:
The measure of the quantity of something rather than its quality is said to be quantitative observation. Quantity of the substance is indicated in numerical values.
(b)
Interpretation:
The information that is given in the statement “When a white powder dissolved in a test tube of water, the test tube felt cold. Hydrochloric acid was then added, and a white solid formed” has to be classified whether it is qualitative or quantitative and whether it relates to physical or chemical property.
Concept Introduction:
Refer to part (a).

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Chapter 1 Solutions
Bundle: Chemistry: The Molecular Science, 5th, Loose-Leaf + OWLv2 with Quick Prep 24-Months Printed Access Card
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- For each scenario below, select the color of the solution using the indicator thymol blue during the titration. When you first add indicator to your Na2CO3solution, the solution is basic (pH ~10), and the color is ["", "", "", "", ""] . At the equivalence point for the titration, the moles of added HCl are equal to the moles of Na2CO3. One drop (or less!) past this is called the endpoint. The added HCl begins to titrate the thymol blue indicator itself. At the endpoint, the indicator color is ["", "", "", "", ""] . When you weren't paying attention and added too much HCl (~12 mL extra), the color is ["", "", "", "", ""] . When you really weren't paying attention and reached the second equivalence point of Na2CO3, the color isarrow_forwardTo convert cyclopentane-CH2-CHO to cyclopentane-CH2-CH3, compound A is added, followed by (CH3)3CO-K+, DMS at 100oC. Indicate which compound A is.arrow_forwardIndicate how to obtain the compound 2-Hydroxy-2-phenylacetonitrile from phenylmethanol.arrow_forward
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