Increasing the concentration increases the speed of reaction by

When the concentration of all the reactants increases, more molecules or ions interact to form new compounds, and the rate of reaction increases.

the old alchemists made significant contributions to science even though there starting premises were off a bit. their conclusions after failure would steer them into better directions for investigation. science is no more than close observation and the initial mistakes result in rethinking and retrying experiments.

its first and third is your answer i did the qustion the fourth isnt right