Chemical Tests Riddles.

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Presentation transcript:

Chemical Tests Riddles

What Am I? I am made of crystals. When I am mixed with water, I dissolve. Some crystals may settle on the bottom but the water is clear. When I am heated, I melt, turn golden brown and then black, and smell like caramel. What unknown am I?

What Am I? I fizz and bubble when vinegar is added to me. I do not burn when I am heated. When red cabbage is added to me, I turn green. What unknown am I?

What Am I? I do not dissolve in water. When my water mixture is filtered, I am left in the filter paper. I turn purple-black when iodine is added to me. When I am heated, I turn brown. What unknown am I?

What Am I? I do not easily mix with water. When my water mixture is filtered, I am left in the filter paper. I have a pleasant smell. I do not burn when I am heated. What unknown am I?

What Am I? When I am mixed with water, I dissolve. When my water mixture is left standing for a few days, I reappear as beautiful crystals. I turn bright purple when red cabbage juice is added to me. What unknown am I?

Chemical Test Objectives Common household chemicals have different physical and chemical properties. Chemicals undergo changes in form, color, and texture when they are mixed together, separated, or heated. Some chemicals can be identified by their interaction with water, vinegar, iodine, red cabbage juice, and heat. Evaporation and filtration are methods for separating mixtures of solids and liquids. Some chemicals can be classified as acids, bases, or neutral substances on the basis of their reactions with red cabbage juice.