Crit C science cards

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16 Terms

1
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What is the reaction rate?
The speed at which reactants are converted into products, often measured by the rate of gas production.
2
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What is a catalyst's role in reaction rates?
Not applicable directly in this reaction, but impurities could affect the reaction rate.
3
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How does concentration affect reaction rate?
The amount of hydrochloric acid per unit volume affects the reaction rate.
4
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What is molarity?
A measure of concentration expressed as moles of solute per liter of solution.
5
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What is purity in the context of hydrochloric acid?
The degree to which hydrochloric acid is free from contaminants, which can influence the reaction rate.
6
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What is an independent variable in an experiment?
The factor being changed, such as the purity or concentration of hydrochloric acid.
7
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What is a dependent variable?
The factor being measured, such as the volume of carbon dioxide produced.
8
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What are controlled variables?
Factors kept constant to ensure a fair test, such as temperature and pressure.
9
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What is effervescence?
The process of gas bubbles forming and escaping, observed when carbon dioxide is produced.
10
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What type of reaction is typically exothermic?
A reaction that releases heat, such as the reaction between hydrochloric acid and calcium carbonate.
11
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What is a neutralization reaction?
A type of reaction where an acid reacts with a base; calcium carbonate acts as the base in this context.
12
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How is gas collection used in experiments?
To measure the volume of carbon dioxide produced, often via a gas syringe or inverted measuring cylinder.
13
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What does the rate of gas production indicate?
How quickly carbon dioxide is produced, reflecting the reaction rate.
14
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What is the saturation point in a reaction?
The point at which the reaction rate no longer increases with higher acid concentration due to limiting factors.
15
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What does pH measure?
The acidity level, which decreases as the reaction proceeds due to acid consumption.
16
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Why are precision and accuracy important in experiments?
They are used to evaluate the reliability of experimental results.