Question

what inference can be drawn from the graph?
a + b \
ightleftharpoons c + d
graph: concentration (y - axis: 0, 5, 10, 15, 20, 25, 30, 35, 40, 45) vs time (x - axis: 0 - 16 seconds). red line starts at ~40, decreases to ~30 then levels off. blue line starts at 0, increases to ~15 then levels off.
options:
a. the reaction between a and b is reactant favored.
b. the amount of product is greater than the amount of reactant.
c. the reaction uses all its reactants to form products.
d. the reaction reaches equilibrium at 1.5 seconds.
e. the amount of reactants is highest at equilibrium.

Explanation:

1. Analyze Option A: A reactant - favored reaction has more reactants at equilibrium. From the graph, the red curve (reactants A + B) has a higher concentration at equilibrium than the blue curve (products C + D), so the reaction is reactant - favored.
2. Analyze Option B: At equilibrium, the concentration of reactants (red curve) is higher than that of products (blue curve), so the amount of product is not greater than the amount of reactant.
3. Analyze Option C: The concentration of reactants does not reach zero, so the reaction does not use all its reactants to form products.
4. Analyze Option D: Equilibrium is reached when the concentrations stop changing. The concentrations stop changing after around 4 - 5 seconds, not at 1.5 seconds.
5. Analyze Option E: At equilibrium, the concentration of reactants is higher than products, but "highest" is incorrect as the initial concentration of reactants was higher (around 40) and at equilibrium it is around 30.

Answer:

A. The reaction between A and B is reactant favored.