Reactions Rates Temperature Surface Area Agitation

Increase in temperature of the reactants can do one of the following

• Slow collision frequency
• Allow less effective collision between the particles
• Cause particles to lose speed
• Increase collision between the particles thus increasing the rate.

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NGSS.HS-PS1-5

Grinding a seltzer tablet into powder increases the rate of reaction due to increased

• concentration
• surface area
• temperature
• reactants

Which factors increase the rate of a reaction.

• increasing temperature
• increasing concentration
• increasing surface area
• all of these

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NGSS.HS-PS1-5

A ______________ is a substance that increases the rate of a reaction without being used up during the reaction. 

• catalyst
• product
• reactant
• solute

Smaller clumps allow for a _________ surface area to be exposed for the reaction.

• larger
• smaller

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NGSS.HS-PS1-5

Increasing the concentration of the reactants will slow down the reaction.

• false 
• true

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NGSS.HS-PS1-5

NGSS.HS-PS1-6

Which of these will NOT speed up the rate of reaction between a strip of magnesium and hydrochloric acid?

• tightly coil up the strip of magnesium
• cut up the strip of magnesium
• increase the concentration of the hydrocholoric acid
• increase the temperature of the hydrocholoric acid

Tags

NGSS.HS-PS1-5

Products will form faster if____________

• the surface area of the reactants are smaller.

• temperature is decreased.
• concentration of the reactants are increased.
• the reaction is not stirred.

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NGSS.HS-PS1-5

(NH₄)₂SO₄ + Ba(NO₃)₂ → 2NH₄NO₃ + BaSO₄

What would happen if we increased the concentration of (NH₄)₂SO₄?

• More product would be produced

• Less (NH₄)₂SO₄ would participate in the reactions

• There would be less collisions between

  (NH₄)₂SO₄ and Ba(NO₃)₂

• There would be more Ba(NO₃)₂ particles to react

Tags

NGSS.HS-PS1-5

In which experiment is the rate of reaction between hydrochloric acid and calcium carbonate slowest? 

• A
• B
• C
• D

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NGSS.HS-PS1-5