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Sep. 29, 2020 — A metabolic engineering research group has developed a strategy to grow an E. coli strain to higher cell density solely on CO2 and formic acid. Formic acid is a one carbon.

Solution Step 1: List the known values and plan the problem. Known Initial [ HNO 2] = 2.00 M K a = 4.5 × 10 − 4 Unknown pH =? First, an ICE table is set up with the variable x used to signify the change in concentration of the substance due to ionization of the acid. Then the K a expression is used to solve for x and calculate the pH.