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A solution has an H3O+ concentration of 3.5 x 10^-5 M. Is it acidic or basic?

What is the pH of a 4.0 x 10^-3 M solution of NaOH?

How many grams of NaCl can be formed if 10.0 mL of a 0.20 M HCl sample is mixed with 10.0 mL of a 0.40 M NaOH sample?