1. Calculate pH of the following acid/base solutions

a) 0.1M HNO3 (nitric acid)

b) 0.03M Ba(OH)2 (barium hydroxide)

c) 0.09mol H2SO4 (sulfuric Acid) in 300ml solution

d) 0.8 g NaOH (Sodium hydroxide 40g/mol) in 400ml solution

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The statement that describes a chemical reaction is the statement c. reactants form products when atoms are rearranged. The atoms of the reactants are arranged is a specific position and number forming a determined compound. In a chemical reaction, the products are different compounds than the reactants, so the atoms have to rearrange to form these new compounds (the products).