Potassium hydroxide is used to precipitate each of the cations from their respective solution. determine the minimum concentration of koh required for precipitation to begin in each case. a. 0.015 m cacl2 b. 0.0025 m fe(no3)2 c. 0.0018 m mgbr2

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?

Which of these is a physical property

Answer asap need it by wednesday morning carry out the following calculations on ph and ka of from data. i. calculate the ph of 0.02m hcl ii. calculate the ph of 0.036m naoh iii. calculate the ph of 0.36m ca(oh)2 iv. calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 v. calculate ka for weak acid ha which has a ph of 3.65 at 0.30m concentration vi. calculate the ka of a solution made by mixing 15.0 cm3 0.2m ha and 60.0 cm3 0.31m a-. [ph= 3.80] vii. calculate the ph of a solution made by mixing 15.0 cm3 0.1m naoh and 35.0 cm3 0.2m hcooh. [ka = 1.82 x 10-4 m]