High School

We appreciate your visit to A Match each situation in column A with the factor in column B These situations pertain to how reactions are sped up Note that items. This page offers clear insights and highlights the essential aspects of the topic. Our goal is to provide a helpful and engaging learning experience. Explore the content and find the answers you need!

A. Match each situation in column A with the factor in column B. These situations pertain to how reactions are sped up. Note that items in column B can be used more than once.

**Column A**

1. Raw potatoes are sliced into thin slices for cooking.
2. Protein is broken down in the stomach by enzymes.
3. Place raw meat in the freezer to prevent it from spoiling.
4. Powdered sugar dissolves faster than sugar cubes.
5. A person fans the coal when grilling barbecue to sustain the heat.
6. More bubbles appear when a concentrated acid is added to a magnesium strip than when a diluted solution of the same acid is added.
7. Exhaust from a car engine passes through a converter, changing most of the harmful nitrogen oxides into nitrogen gas and oxygen gas.
8. The baker turns up the oven when baking bread.
9. The limestones are eroding because of the continuous rainfall.

**Column B**

a. Catalyst
b. Surface Area
c. Temperature
d. Concentration

B. Carefully read each question. Then write the letter of the correct answer on the blank.

1. What would make the product form faster?
a. Making the size bigger
b. Decreasing the temperature
c. Not stirring the substances
d. Increasing the concentration of reactants

2. Why does increasing the temperature of the reactants increase the rate of chemical reaction?
a. It provides more energy for the particles to move faster.
b. It causes the reactants to change the phase of matter from solid to liquid.
c. It makes the particles smaller in size, making them easier to collide with one another.
d. It lowers the required amount of overall energy for the reaction to occur.

Answer :

Let's analyze the situations given in Column A and match them with the appropriate factor from Column B:

  1. Raw potatoes are sliced into thin slices for cooking.

    • Factor: Surface Area (b)
      • Explanation: Slicing increases the surface area, allowing the potatoes to cook faster as more area is exposed to heat.

  2. Protein is broken down in the stomach by enzymes.

    • Factor: Catalyst (a)
      • Explanation: Enzymes act as catalysts to speed up the breakdown of proteins in the stomach.

  3. Place raw meat in the freezer to prevent it from spoiling.

    • Factor: Temperature (c)
      • Explanation: Freezing lowers the temperature, slowing down the rate of spoilage reactions.

  4. Powdered sugar dissolves faster than the sugar cubes.

    • Factor: Surface Area (b)
      • Explanation: Powdered sugar has a greater surface area compared to sugar cubes, allowing it to dissolve quicker.

  5. A person fans the coal when grilling barbecue to sustain the heat.

    • Factor: Temperature (c)
      • Explanation: Fanning increases oxygen supply, increasing temperature and maintaining the reaction rate.

  6. More bubbles appear when a concentrated acid is added to a magnesium strip than when a diluted solution of the same acid is added.

    • Factor: Concentration (d)
      • Explanation: Higher concentration results in faster reactions, producing more bubbles.

  7. Exhaust from a car engine passes through a converter, changing most harmful nitrogen oxides into nitrogen gas and oxygen gas.

    • Factor: Catalyst (a)
      • Explanation: The converter uses a catalyst to speed up the breakdown of harmful gases.

  8. The baker turns up the oven when baking bread.

    • Factor: Temperature (c)
      • Explanation: Increased temperature speeds up the chemical reactions involved in baking.

  9. The limestones are eroding because of the continuous rainfall.

    • Factor: Surface Area or Concentration (possible explanations)
      • Explanation: Rainfall can increase the surface exposure or acidity, affecting erosion rate.

Now, let's address questions B:

  1. What would make the product form faster?

    • Chosen Answer: d. Increasing the concentration of reactants
      • Explanation: A higher concentration increases the likelihood of particle collisions, speeding up the reaction.

  2. Why does increasing the temperature of the reactants increase the rate of chemical reaction?

    • Chosen Answer: a. It provides more energy for the particles to move faster.
      • Explanation: Higher temperatures provide particles with more kinetic energy, leading to more frequent and energetic collisions, thus increasing the reaction rate.

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Rewritten by : Barada