https://padlet.com/allygeren2022/mmkaflefegnt Made with mirth en-us 2018-02-27 16:39:43 UTC 2025-11-02 05:53:56 UTC hello@padlet.com allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/237023597 One way to know that a chemical change occurs is if, after substances are combined, it begins to fizz. Another word for this is effervescence, which means when gas is released in a liquid.]]> 2018-03-01 16:46:39 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/237023597 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/237025629 An example of an effervescence or fizz, is when an alka seltzer tablet is added to a cup with water and oil. The oil sits above the water because it is less dense. ]]> 2018-03-01 16:49:22 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/237025629 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/237027012 Another way to know that a chemical change has occurred is if, after substances are combined, it lets off a new smell. Another word for this is aroma, which means smell.]]> 2018-03-01 16:51:20 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/237027012 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/237034313 When the alka seltzer tablet is dropped into the suspension of oil and water, it drops to the bottom, because it is more dense than both the water and the oil. After it drops to the bottom, it begins to dissolve in the water. Then, a new substance is created in the form of carbon dioxide gas. Because the fizz is gaseous, it is less dense than both the water and oil, so it floats to the top.]]> 2018-03-01 17:00:57 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/237034313 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/237035199 2018-03-01 17:02:12 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/237035199 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/237035633 A second example of a fizz or effervescence is when baking soda and vinegar are combined. The vinegar starts off in a cup.]]> 2018-03-01 17:02:50 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/237035633 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/237038693 Next, baking soda is added to the vinegar. The two substances combined begins to bubble, and a new substance, carbon dioxide, is created. This is because it is an acid-base reaction. Baking soda is a bicarbonate (NaHCO₃) and vinegar is an acetic acid (HCH₃COO), which causes them to react and exchange a proton.]]> 2018-03-01 17:07:22 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/237038693 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/238715673 2018-03-06 16:31:29 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/238715673 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/238716555 Additionally, you know that a chemical change has occurred if, after substances are combined, its color changes into a color unlike the colors of the original reactants.]]> 2018-03-06 16:32:42 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/238716555 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/238718035 An example of an aroma is when bacon fries. Butter or oil is put on a pan and melted. Bacon is then taken out of its package and put on the pan.]]> 2018-03-06 16:34:40 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/238718035 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/238723676 As it fries, it lets off a new aroma. This is because amino acids chemically react with the reducing sugars of the fat while exposed to the heat. The acid and sugars combine and create a chemical change, causing the bacon to smell differently.]]> 2018-03-06 16:41:44 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/238723676 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/238732708 2018-03-06 16:54:13 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/238732708 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/238734236 Another example of a new aroma occuring in a chemical reaction is when milk turns sour. It occurs when milk is exposed to more heat than it should be, causing it to become sour and develop a new smell.]]> 2018-03-06 16:56:13 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/238734236 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/238737574 The milk, once turned sour, cannot be reverted back into its original form. It can also react and turn sour when exposed to acid.]]> 2018-03-06 17:00:37 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/238737574 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/238739315 2018-03-06 17:03:09 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/238739315 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/238741887 An example of a chemical reaction shown by a color change is when leaves change colors throughout the seasons. It begins as a green color and changes into either a red, orange, yellow, or brown.]]> 2018-03-06 17:06:47 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/238741887 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239214677 This is because chlorophyll is released as the seasons change, which alters the color of the leaves from green to red, orange, yellow, or brown. As the chlorophyll is released, a pigment is created that changes the leaves' colors.]]> 2018-03-07 15:50:11 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239214677 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239217324 2018-03-07 15:54:03 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239217324 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239219549 You begin with three solutions...
Solution 1: Add 43 g of Potassium Iodine to 800 mL of distilled water. Then, add it to 4.5 mL sulfuric acid, and stir until the potassium iodine is dissolved.
Solution 2: Add 15.6 g malonic acid and 3.4 g manganese sulfate monohydrate to 800 mL of distilled water, and then add 4 g of vitex starch.
Solution 3: Dilute 400 mL of 30% hydrogen peroxide to 1L.]]> 2018-03-07 15:57:32 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239219549 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239250809 Pour solutions 1 and 2 into a beaker together, and turn on a stirring plate. Slowly add solution 3 after mixing solutions 1 and 2. This makes the clear substance  turn different colors. It turns blue, yellow,  and back to transparent, creating a new substance.]]> 2018-03-07 16:40:24 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239250809 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239750529 2018-03-08 16:24:59 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239750529 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239751008  Another way to know that a chemical reaction has occurred is if, after substances have combined, their temperature changes.]]> 2018-03-08 16:25:33 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239751008 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239752692 An example of a chemical reaction shown by a temperature change is when hydrochloric acid is added to sodium carbonate. It begins with a small cup of sodium carbonate (Na2Cl3), and hydrochloric acid (2 HCl) is added to it.]]> 2018-03-08 16:27:42 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239752692 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239756333 The sodium carbonate reacts with the hydrochloric acid to create many different substances, water and carbon dioxide being two of them. It is an exothermic reaction, where heat is gained, and the temperature rises.]]> 2018-03-08 16:32:45 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239756333 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239758211 2018-03-08 16:35:23 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239758211 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239759040 Another example of a temperature- changing chemical reaction is photosynthesis. This is the process in which organisms utilize sunlight in order to get food.]]> 2018-03-08 16:36:30 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239759040 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239764079 You know a chemical change has occurred if, when liquid substances are combined, a solid, or precipitate, is created.]]> 2018-03-08 16:43:41 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239764079 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239765183 The final, and most important way to prove that a chemical change has occurred, is if a new substance is created. If a new substance isn't created, it's not a chemical reaction.]]> 2018-03-08 16:45:21 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239765183 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239766534 Photosynthesis is an endothermic reaction, meaning that it absorbs heat. It begins with chlorophyll, carbon dioxide, water, and energy, and creates glucose and oxygen.]]> 2018-03-08 16:47:21 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239766534 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239767756 2018-03-08 16:49:06 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239767756 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239768599 An example of a chemical reaction that creates a precipitate is when copper sulfate and sodium carbonate are combined. The experiment begins with a bit of copper sulfate inside of a cup. Sodium carbonate is added, and a precipitate is created.]]> 2018-03-08 16:50:17 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239768599 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239769718 The substances begin as solely copper sulfate and sodium carbonate. Once they are combined, a solid becomes created, and new substances are formed. One example is copper carbonate, or CuCO3]]> 2018-03-08 16:51:56 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239769718 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239771434 2018-03-08 16:54:25 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239771434 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239773224 Another example of a precipitate being created is soap scum. Soap scum is the hardened solid you can see on shower glasses or walls near a shower. It is a white solid that forms from water and soap.]]> 2018-03-08 16:56:58 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239773224 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239774545 When soap and hard water are combined, soap scum is created. The soap and water are both liquids, and the soap scum is a solid. The two substances combine to create calcium stearate, magnesium stearate, and other waste products.]]> 2018-03-08 16:58:57 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239774545 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239775076 2018-03-08 16:59:44 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239775076 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239776311 An example of a new substance being created is when sugar is burned. You begin with a tin to keep sugar in, and use tongs to shake it above an intense flame.]]> 2018-03-08 17:01:48 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239776311 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239776807 After the sugar is exposed to the heat long enough, new substances are created. The sugar then creates water and carbon dioxide.]]> 2018-03-08 17:02:34 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239776807 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239777377 2018-03-08 17:03:29 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239777377 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239777746 Another example of a chemical reaction creating a new substance is when a bath bomb is put into water. You begin with a bath bomb, which is made up of mostly baking soda and citric acid. You also have a tub of water.]]> 2018-03-08 17:04:10 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239777746 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239778874 You then drop the bath bomb into the tub of water. It undergoes a chemical reaction, and creates a new substance; carbon dioxide. This is because as the two substances chemically react, and effervescence is created, and carbon dioxide is released.]]> 2018-03-08 17:06:04 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239778874 allygeren2022 https://padlet.com/allygeren2022/mmkaflefegnt/wish/239780163 2018-03-08 17:08:05 UTC https://padlet.com/allygeren2022/mmkaflefegnt/wish/239780163