(a)
Interpretation:
The balanced equation for the reaction of treatment of finely divided gold with CN-(aq) in the presence of O2 (g) should be written.
Concept introduction:
The balanced chemical equation can be written by following a few steps:
Step 1: Writing the correct skeleton and molecular formula for the element or molecules on either side of the equation.
Step 2: Counting the
Step 3: Balancing the number of that atom or group on either side which has large atoms in number.
Step 4: Using the correct coefficients to balance the number of atoms on both sides.
(b)
Interpretation:
The balanced equation for the reaction of treatment of finely divided zinc metal with solution formed in part (a) should be written.
Concept introduction:
The balanced chemical equation can be written by following a few steps:
Step 1: Writing the correct skeleton and molecular formula for the element or molecules on either side of the equation.
Step 2: Counting the number of atoms of each element on either side of the equation.
Step 3: Balancing the number of that atom or group on either side which has large atoms in number.
Step 4: Using the correct coefficients to balance the number of atoms on both sides.
Want to see the full answer?
Check out a sample textbook solutionChapter 20 Solutions
Chemistry: Principles and Reactions
- A slag sample is known to contain all of its iron in the forms of FeO and Fe2O3. A sample of 1,000 g of the slag was dissolved in hydrochloric acid according to the usual method, then reduced with stannous chloride and finally titrated with a 0.02237 M solution of potassium permanganate, of which 28.59 mL were used. A second aliquot of the slag sample, weighing 1,500, was dissolved in a nitrogen atmosphere to further adjust the oxidation state of the iron, it was immediately titrated with the same potassium permanganate solution. If this second experiment required 15.60 mL of permanganate solution, calculate: a) The percentage of total iron in the slag. b) The percentages of the oxide FeO and Fe2O3arrow_forwardThe lustre of a metal is due to:(a) its high density(b) its high polishing(c) its chemical inertness(d) Presence of free electrons.arrow_forwardWhat are the oxidation numbers of Fe(ClO3)3?arrow_forward
- In aqueous solution, hydrogen sulfide reduces (a) Fe3 + toFe2+ , (b) Br2 to Br - , (c) MnO4- to Mn2 + , (d) HNO3 to NO2.In all cases, under appropriate conditions, the product iselemental sulfur. Write a balanced net ionic equation foreach reaction.arrow_forwardThe disproportionation of CO to graphite and CO₂ is ther-modynamically favored but slow.(a) What does this mean in terms of the magnitudes of the equi-librium constant (K), rate constant (k), and activation energy (Ea)?(b) Write a balanced equation for the disproportionation of CO.(c) Calculate K꜀ at 298 K. (d) Calculate Kₚ at 298 Karrow_forwardUse atomic properties to explain the reduction of a less ac-tive metal by a more active one: (a) in aqueous solution; (b) inthe molten state. Give a specific example of each processarrow_forward
- (i) Name the method used for the refining of titanium. (ii) What is the role of Zn in the extraction of silver? (iii) Reduction of metal oxide to metal becomes easier if the metal obtained is in liquid state. Why?arrow_forwardUsing the periodic table to locate each element, write the electron configuration of (a) V; (b) Y; (c) Hg.arrow_forward(1) Calculate oxidation number of: (a) Cr in Cro7 2- (b) P in Na2HPO4 (c) S in H2SO4 (II) Write the balanced equation for the reaction when: zinc sulphide reacts with oxygen giving zinc oxide and sulphur dioxide.arrow_forward
- Name an alloy of:(i) Aluminium used is construction of aircrafts(ii) lead in joining metals for electric work(iii) copper used is house hold vesselsarrow_forwardWhat is the highest oxidation state for (a) Nb; (b) Y; (c) Tc?arrow_forwardWrite a chemical equation for the reaction of CoCl2 times 6H2O with K3PO4. A solid white precipitate is formed when the reaction occurs.arrow_forward
- Chemistry: Principles and PracticeChemistryISBN:9780534420123Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward MercerPublisher:Cengage Learning