10 ml of a 3% hydrogen peroxide solution is added to five test tubes. as the hydrogen peroxide decomposes to produce oxygen gas, the rate of oxygen production is rated on a scale of 0 - 5, 0 meaning "no oxygen" and 5 meaning "fast".

potential catalyst effects on reaction rate
reactant produced
2
+0.1m 5
+0.1m 0
+0.1m fe(no3) 4
+0.1m 0

to the other four test tubes of hydrogen peroxide, five drops of additional solutions are added. the solutions are indicated in the data table as well as the rate of oxygen production for each.

based on the data, what is the most appropriate conclusion for this experiment?

a) iron compounds are always used as catalysts.

b) reaction rate is always increased by iron compounds.

c) increasing the temperature increases the rate of decomposition.

d) iron compounds are a catalyst for the decomposition of hydrogen peroxide.

D) Iron compounds are a catalyst for the decomposition of hydrogen peroxide.

Explanation:

The reaction of descomposition of hydrogen peroxide (H₂O₂) to produce oxygen (O₂) is:

2H₂O₂ → 2H₂O + O₂

Based on the data of potential catalys effects on reaction rate:

A) Iron compounds are always used as catalysts.  FALSE. It is possible to know that, for this reaction, iron compounds are acting as catalyst but there is no information about all reactions to know that iron compounds are always catalysy

B) Reaction rate is always increased by iron compounds.  FALSE. Again, for this reaction iron compounds increases reaction rate but it is not possible to know that reaction rate is always increased by iron compounds.

C) Increasing the temperature increases the rate of decomposition.  FALSE. There is no information about temperature of reaction.

D) Iron compounds are a catalyst for the decomposition of hydrogen peroxide. TRUE. As both iron compounds increases the rate of reaction, it is possible to say that iron compounds are a catalyst for the descomposition of hydrogen peroxide.

I hope it helps!

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

haploid cells;