Chemistry, 05.11.2019 04:31 Mikkixo3735
Scoring scheme: 3-3-2-1 question 1b) an unknown solution could contain any or all of the following cations: k+, ca2+, cr3+, mn2+, fe3+, co2+, zn2+. a 1 ml portion of the unknown is treated with 2 ml of 6 m naoh, added a few drops at a time with shaking. immediately thereafter, 10 drops of 3% hydrogen peroxide are added dropwise with shaking, and the test tube is then heated for a few minutes in a water bath until bubbling ceases. the resulting conglomerate is then centrifuged and the supernatant liquid is decanted off and saved. (although you have not demonstrated these facts for yourself, ca2+ will be precipitated as the hydroxide at this stage and k+ will remain in the decanted liquid.) at this stage of the experiment which elements could be found in the precipitate? select all that apply.
Answers: 1
Chemistry, 22.06.2019 11:00, snowprincess99447
Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.
Answers: 1
Chemistry, 22.06.2019 18:00, LuvieAnn1886
How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.
Answers: 3
Chemistry, 23.06.2019 00:00, jasmin5285
What is the approximate mass of 25 cm3 of silver, if the density is 10.5 g/cm3? a. 0.42 g b. 2.4 g c. 42 g d. 260 g
Answers: 1
Scoring scheme: 3-3-2-1 question 1b) an unknown solution could contain any or all of the following...
History, 06.12.2019 04:31
History, 06.12.2019 04:31
Mathematics, 06.12.2019 04:31
Biology, 06.12.2019 04:31
Chemistry, 06.12.2019 04:31
History, 06.12.2019 04:31