)what are the standard ways to make a solution of known concentration? (select all that apply.) a. dissolve a weighed amount (known mass) of stock solution into a known volume of liquid. b. dissolve a known volume of solid into a known mass of liquid. c. dilute a known volume of stock solution into a known volume of liquid. d. dissolve a weighed amount (known mass) of solid into a known volume of liquid.

s too much pool water may lead to chlorine poisoning. the concentration of chlorine in public drinking water is extremely low and not harmful to human health. sooo yeahh

explanation:

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explanation:

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.