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, 21.06.2019 21:00, alexmarche4675
Mrs. smith ordered a root beer float (vanilla ice cream + root beer). mrs. smith noticed that the three states of matter (solid, liquid, and gas) all existed simultaneously in her root beer float. a. identify each phase of matter in the root beer float. b. describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? ) c. identify one phase change you would see in a root beer float and described what causes this change.
Answers: 2
Chemistry, 22.06.2019 20:30, jaydenbrock
Identify the correct mole ratio for each substance. sodium chloride (nacl) na: cl = 1: ammonium nitrate (nhno) h: o = 4:
Answers: 1
Chemistry, 23.06.2019 01:30, bgarrison364
What is produced from neutralization of an acid and a base? a. hydronium ions b. citric acid c. salt and water
Answers: 1
Chemistry, 23.06.2019 03:50, lindseyklewis1p56uvi
What is the equation fort the alkaline zinc/manganese dioxide cell. a) anode b)cathode c)overall equations.
Answers: 2
Scoring scheme: 3-3-2-1 question 1b) an unknown solution could contain any or all of the following...