leahstubbs
06.05.2020 •
Chemistry
Your cousin is preparing a classic volcano for her school's science project using baking soda and vinegar, but she is disappointed that her volcano is not as exciting as the one she saw online. Knowing that you're taking chemistry, she asks for your help. Based on what you learned in experiment 2, which of the following changes is likely to result in the most exciting volcano?A. Combining the reactants in their stoichiometric ratio to ensure maximum production of product.
B. Adding excess vinegar to drive the reaction equilibrium toward products.
C. Using more baking soda, because it is responsible for producing the CO2 gas that erupts from the volcano.
D. Forming the baking soda into a cube so it will react all at once.
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Ответ:
Explanation:
Carbonic acid (H2CO3) is formed when vinegar (CH3COOH) and baking soda (NAHCO3) are mixed which is unstable and decomposes to produce CO2. This is what will make the bubble rise and fizz steadily to the top of the volcano.
CH3COOH + NAHCO3 ⇄ CH3COONa + H2CO3
H2CO3 ⇒ H2O + CO2
Vinegar is dilute Acetic acid, the reaction equilibrium will be shifted to the product side upon the addition of more vinegar. Hence, more H2CO3 will form, that is more CO2 will form. This would lead to more bubbles arising.
Therefore, the answer is option B - adding excess vinegar to drive the reaction equilibrium to the product side.
Ответ:
Explanation:
A particle that travels around the nucleus of an atom in orbitals is called a(n) quark.