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The 2 chemicals react and bubble. They also, as with any other chemical reaction, produc a new substance.

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when NaCl and AgCl mix, they produce a white solid: silver nitrate, or AgNO3. The 2 clear substances make a white solid

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The picture shows what happens when ammonia and copper sulfate are mixed. The mixture turns various shades of blue.

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In the picture, the magnesium ribbon was dropped into the hydrochloric acid. Once that happened, the HCl started fizzing and bubbling up.

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Sugar and caustic soda solution + potassium permanganate solution

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Sugar and caustic soda solution + potassium permanganate solution

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The sugar and caustic soda solution is clear. The potassium permanganate solution is brown or black. When they mix, the substance turns light purple.

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Video Lab: Chemical reaction: Change in Color

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In the video not only does the reaction fizz but it also makes a smell. Lemon juice smells sour and baking soda doesn't really smell like anything, so it produces a lemony smell.

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When the 2 chemicals are mixed, the thermometer goes down. The temperature is decreasing. The mixture also bubbles up.

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Chemical Reactions - Temperature change and Gas production - video 2

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When the lead nitrate is mixed with the sodium iodide, it turns into a bright yellow solid. They turned into a precipitate known as lead iodide.

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One of my favorite reactions, mixing sodium iodide and lead nitrate gives a precipitate of lead iodide. Solubility Rules: http://www.csudh.edu/oliver/chemdata/solrules.htm Cool Chemistry Merchandise Here: http://www.cafepress.com/TheChemistryQuestion

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In the video, the chromium oxide was burnt and got turned into a black solid that looks like a volcano. There were flames coming out of the new substance.

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Chemical Volcano and Fire Blizzard with Chromium Oxide!

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In the video, the hydrochloric acid is being mixed with the sodium carbonate powder. When it is mixed, it creates a new substance: carbon dioxide. It also bubbles up and fizzes.

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hydrochloric acid reacts with Sodium carbonate

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The bread and heat produce both a color change and an aroma. Before the bread is heated, it does not really have a smell. After it's heated, it smells kind of burnt.

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The mixture bubbles up and fizzes. It also changes temperature. The temperature decreases when citric acid and sodium bicarbonate are mixed.