You have a solution of NaOH with a concentration of 5.0M. You take 250.0 mL of the 5.0M solution and and add water until you have 500.0 mL of diluted solution. What is the concentration of the diluted solution to two significant figures?

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.