Chemistry > GIZMOS > GIZMO Chemical Changes Virtual Lab 2021/2022 | Already Graded A+ (All)

GIZMO Chemical Changes Virtual Lab 2021/2022 | Already Graded A+

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Date: 08/23/2021 Chemical Changes Virtual Lab Directions: Follow the instructions to go through the simulation. Respond to the questions and prompts in the orange boxes. Vocabulary: acid, base, ca... talyst, chemical change, coefficient, conservation of matter, decomposition, dissolve, double replacement, endothermic, exothermic, indicator, ion, physical change, product, reactant, single replacement, subscript, synthesis Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. A student mixes baking soda and vinegar in a glass. The results are shown at left. Do you think any new substances are being created in this mixture? If so, how do you know? Yes, and I believe the new substance is carbon dioxide because when you combine the solid baking soda and liquid vinegar you get Carbon Dioxide. 2. Suppose this was done on top of a balance. Do you think the mass would change as the reaction proceeded? The mass would stay the same at the beginning but as time mass and gas is allowed to escape then the mass will gradually decrease. 3. What do you think would happen to the mass if the reaction took place inside a sealed plastic bag? The mass would stay the same because the bag is sealed. Gizmo Warm-up A chemical change, (or chemical reaction) occurs when one or more substances, called reactants, are transformed into different substances, or products. In the Chemical Changes Gizmo, you will look for evidence of chemical changes by looking at changes you can see, touch, or smell. To begin, check that Reactant 1 is Sodium and Reactant 2 is Water. Sodium is a metal so soft you can cut it with a knife. 1. Click Play ( ). What do you observe? The sodium was placed in the water causing the mass of water [Show More]

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