on 38 out of phenolphthalein methyl red phenol red chlorophenol red 9 yellow Select one: O barium O nickel(II) O copper(II) O chromium(II) yellow The colour of the chlorophenol red indicator would be An unknown lonic solid is dissolved in distilled water to make a blue aqueous solution. A flame test is performed and it produces a green flame. Which of the following cations did the ionic solid most likely contain? Proctorio is sharing your screen. Stop sharing Hide Finish atte

Using IUPAC norms write the formulae for the following:(i) Sodium dicyanidoaurate (I)(it) Tetraamminechloridonitrito-N-platinum (IV) sulphate

In trilonometric (“complexonometric") titration as a titrant is used: EDTA solution Hg(NO3)2 solution; KĄ[Fe(CN)6] solution; Hg(CN)2 solution;

The oxide of a metal M was water soluble when a blue litmus strip was dipped in This solution, it did not go any change in colour. Predict the nature of oxide.

Explain why colour of KMnO4 disappears when oxalic acid is added to its solution in acidic medium.

Would you expect salts of the gold(I) ion, Au+, to be colored? Explain.

2. A common reagent is used to identify zinc and copper ions:A) Sodium sulideB) Potassium hexacyanoferrate (II)C) Potassium hexacyanoferrate (III)D) Ammonia solutionE) Potassium iodide

1. When Pearl added (NH4)2CO3 solution to an unknown salt solution in basic conditions, the solution remained clear and colorless. Which of the following is the metal ion present in the salt solution?a.Ca2+b.K+c.Sr2+d.Ba2+2. The unknown salt solution assigned to Hayoung produced a white precipitate with (NH4)2CO3 (in basic conditions), and the resulting precipitate is soluble in 6 M CH3COOH. Then, she added 3 drops of 1 M K2CrO4 to a portion of the original salt solution, and a yellow precipitate was observed. What is the identity of the yellow precipitate? a.Na2CrO4 b.BaCrO4 c.CaCrO4 d.(NH4)2CrO4

6. A mixture contains at least one of the ions in the silver group (Ag*, Hg²*, Pb²+). Read the following procedure and determine which ions are present. Cold 6M HCl was added to the mixture producing a white precipitate. Hot water was then added and the solution was stirred, and the supernatant decanted to isolate a white precipitate after centrifugation. Sulfuric acid was added to one portion of the supernatant and potassium chromate was added to a second portion of the supernatant, but no precipitates formed. The isolated white precipitate was mixed well with 4 drops of concentrated ammonia. The resulting solution was centrifuged. The supernatant was decanted to show the presence of a grayish-black precipitate. To the supernatant, concentrated nitric acid was added dropwise until blue litmus paper added turned red and a white precipitate was present.

The periodic trend which is responsible for the observation that the maximum oxidation state of the transition-metal elements peaks near groups 7B and 8B?