Crime Buster Powders

Front

What is the identity of a powder that becomes a hard solid in water, does not clear iodine, and has a pH of 6?

Back

Sugar and Powdered Gelatin

Front

What powder is white and bubbles violently when added to hydrochloric acid (HCl)?

Back

Baking Soda

Front

What is the molecular formula for cornstarch?

Back

C27H48O20

Front

What is the identity of a powder that is insoluble in water and produces a terrible smell when iodine is added?

Back

Sand

Front

What powder has a pH of 6 in water and quickly hardens into a single piece?

Back

Gypsum

Front

What is the chemical reaction that occurs when baking soda is mixed with hydrochloric acid?

Back

Baking soda (sodium bicarbonate) reacts with HCl to produce carbon dioxide, water, and sodium chloride.

Front

What is the role of powdered gelatin in mixtures?

Back

Powdered gelatin acts as a thickening agent and can form a gel when mixed with water.

Front

What is the significance of pH in identifying powders?

Back

pH indicates the acidity or alkalinity of a solution, which can help identify the chemical nature of a powder.

Front

What are the properties of sugar in a mixture?

Back

Sugar is soluble in water, does not react with iodine, and has a neutral pH.

Front

What happens to gypsum when mixed with water?

Back

Gypsum hardens into a solid when mixed with water, forming a strong material.