Why does a higher concentration increase the rate of reaction?

Question

a
It increases the frequency of collisions.
b
It increases the surface area of the particles
c
It lowers the activation energy.
d
It decreases the amount of reactants.

22. Which of these elements on the Periodic Table is the most electronegative?
A) Li
B) Mg
C) F
D) P

23. Looking at the periodic table, determine the number of valence electrons present in Potassium (K).
A) 4 valence electrons
B) 2 valence electrons
C) 1 valence electron
D) 3 valence electrons

24. This chemical reaction is balanced. 1 C2H5OH + 2 O2 → 2 CO2 + 3 H2O
true
false

Answer 1

21. Why does a higher concentration increase the rate of reaction?

• a: It increases the frequency of collisions. Higher concentration means more reactant particles are present in a given volume, leading to more frequent collisions and thus a higher rate of reaction.

22. Which of these elements on the Periodic Table is the most electronegative?

• C) F Fluorine (F) is the most electronegative element on the periodic table.

23. Looking at the periodic table, determine the number of valence electrons present in Potassium (K).

• C) 1 valence electron Potassium (K) is in Group 1 of the periodic table and has one valence electron.

24. This chemical reaction is balanced. 1 C2H5OH + 2 O2 → 2 CO2 + 3 H2O

• true The equation is balanced with respect to the number of atoms of each element on both sides of the equation.