Rate of Reaction and Reactivity Series

What is effective collision?

• The collision that produce new substance.

• The collision that has energy.

• The collision that influence the rate of reaction.

• The collision that break down all the cubstances.

Rate of reaction can be measured by ... .

• Measuring the bubble amount.

• Measuring the product decreases.

• Measuring the product increases.

• Measuring the reactant increases.

Look at the picture. What method is used to measure the rate of reaction according to the picture?

• Product's mass measuring.

• Product volume measuring.

• Reactant volume measuring.

• Reactant's mass measuring.

Look at the chemical reaction below:

Mg+ Cu(NO3)2-->

Write the product.

• MgCu(NO3)2

• CuMg(NO3)2

• Cu+ Mg(NO3)2

• CuMg+ (NO3)2

Which single displacement can occur?

• Al+ Li2SO4Al

• Li+ Al2(SO4)3

• LiAl+ (SO4)3

• Al+ Li

Answer explanation

Li is more reactive than Al according to reactivity series.

A student add marble chip into hydrochloric acid to produce carbondioxide bubble. Which way cannot ben used to speed up the chemical reaction?

• Adding more marble chip.

• Using high concentration of hydrochloric acid.

• Use marble powder.

• Heat the chemical reaction.

A student plan to investigate the rate of reaction written below:

Na2S2O3(aq)+ 2HCl(aq)--> 2NaCl(aq)+ H2O(l)+SO2(s)+ S(s)

The student did the experiment at home. He doesn't have electrical balance and syringe. What method the student can use?

• 
• 
• 
• 

Look at the picture. Differentiate the situation of those 3 chemical reaction.

• Those three chemical reactions are the chemical reaction using the different time.

• Those three chemical reactions are done in 3 different reactant.

• Those three chemical reactions are done in 3 different temperature in which the red graph is the highest, follow by blue graph and yellow is the lowest.

• Those three chemical reactions are done in 3 different temperature in which the yellow graph is the highest temperature, follow by blue graph and red.

A student investigate the reactivity of some unknown metals: X, Y and Z. She used the same amount of those metals in the test tubes, then add the same amount of hydrochloric acid. Those metals reacted to produce gass. X stop react after 45 sec. Y stop react after 26 sec. Z stop react after 65 sec.

Arrange the reactivity of those 3 metals from the most reactive to the least reactive.

• X, Y, Z

• Z, Y, X

• Y, X, Z

• Z, X, Y

A student want to investigate the influence of concentration to the rate of reaction written below:

Fe + HCl --> FeCl+ H2

What to keep the same and different?

• We've to keep the same amount of Fe and HCl but set the different time to do the experiment.

• We've to set all the same, unless the amount of HCl.

• We have to keep the amount of Fe and HCl the same but using different HCl concentration.

• We've to use catalyst and more Fe. But we keep using the same item of chemical.