Please I need the answer, very urgent Calculate the PH of the solution obtained if 40 cm3 of 0.2 M HCl was added to 30 cm3 of 0.1 M NaOH​

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.