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Chemical Changes Lab

Decent Essays

There’s a difference between a chemical and physical prop-erties/changes. Physical properties are an aspect of matter that can be observed or measured without changing it. The Examples for Physical properties would include: color, smell, freezing point, boiling point, melting point, etc. While Chemical properies may only be observed by changing the chemical identity of a substance. An example for Chemical properties would be rusting iron. Physical change rearranges molecules but doesn't affect their internal structures. Examples of this change would be a substance can go from a solid to a liquid, a liquid to a gas, a gas to a liquid, a liquid to a solid, and a solid to a gas. Chemical change is any change that results in the formation of new …show more content…

First lab. The burning of the strip of magnesium causes it to ignite a bright spark, leaving the burnt remains in to white ash. The result is a CHEMICAL CHANGE. Because once you burn it, you couldn’t turn the white ash back to its original form. Second lab:. Third lab: when I mixed the Sodium Hydroxide with water, the mixture change to the color pink. The result is a CHEMICAL CHANGE. Because you couldn’t change the pink color back to clear water before it was poured with Sodium Hydroxide. Fourth Lab: When I mixed the Baking Soda with Vinegar, it fizzes up to the top of the beaker. The result is a CHEMICAL CHANGE. Because the Baking Soda is already in the Vinegar and you couldn’t extract it out once it fizzes. Fifth Lab: the mixture of Baking Soda and water resulted with a semi-greyish color within the beaker. The result is BOTH A CHEMICAL AND PHYSICAL CHANGE. Because even though the mixture resulted to a different color, you could evaporate it and bring back the baking soda as it was while the water itself extracted. Sixth Lab: When I poured a bit of Vinegar to the beaker of milk, it quickly break up the milk into clumps which produced a “sour” odor similar to spoiled milk. The result is a CHEMICAL CHANGE. Because the Vinegar turned the milk into cheesy chunks and you couldn’t turn it back to its original liquid form. And the Seventh lab: After I mixed the drops of Potassium iodide and Lead Nitrate, its color turned into neon green. The result is a CHEMICAL CHANGE. Because the mixture changed into an unexpected color since the Potassium iodide has the color brown, and the Lead Nitrate is a clear liquid, when mixed turned to neon green and you couldn’t separate them back to normal. Now for the Heat Curve Lab. During the 12 minutes of heating the beaker of water and ice while reading the changes of its temperature of the thermometer sticking inside. It started out slow at first, but until about four minutes later the

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