Asolution is prepared at 25 °c that is initially 0.23 m in propanoic acid, a weak acid with k, = 1.3 x 10^-5, and 0.42 m in sodium propanoate. calculate the ph of the solution. round your answer to 2 decimal places.

18. use the activity series to predict whether the following synthesis reaction will occur. write the chemical equations for the reaction if it's predicted to occur. (s) + o2(g) -> *note: it is possible.*

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer