Question

why do you need to know the temperature of the reaction? (select all that are correct)
the rate constant k is affected by the temperature.
the rate of the reaction depends on the temperature of the solution.
the arrhenius equation is based on the reation being run at two different temeratures.
you always take the temperature of solutions.

Explanation:

The rate - constant $k$ in chemical kinetics is temperature - dependent as per the Arrhenius equation ($k = A e^{-\frac{E_a}{RT}}$), and the reaction rate is related to $k$. The Arrhenius equation is often used to analyze reactions at different temperatures. Just taking the temperature of solutions is not a valid scientific reason for knowing the reaction temperature.

Answer:

The rate constant k is affected by the temperature.
The rate of the reaction depends on the temperature of the solution.
The Arrhenius Equation is based on the reaction being run at two different temperatures.