Carbon (as graphite) has a density of about 2.3 g/cm\\ Germanium has a density o
ID: 920471 • Letter: C
Question
Carbon (as graphite) has a density of about 2.3 g/cm Germanium has a density of about 5.3 g/cm^3 Using the periodic table. predict whether silicon will have a density greater than that of germanium. Make the same kind of prediction for tin. Explain your reasoning. Consider three substances. A. B. C. which can all act as oxidizing agents In their reactions they will be reduced to A . B . and C . It is found that when a solution of A is mixed with a solution containing C . an oxidation-reduction reaction occurs. Write the equation for the reaction: Which species is oxidized? Which species is reduced? It is then found that w hen a solution of A is mixed with one containing B . no reaction occurs. Is A or B the better oxidizing agent? Is A or C the better oxidizing agent? Arrange A. B. and C in order of increasing strengths as oxidizing agents: Chemists often make tables or flow charts to summarize the results of know n tests and to use when identifying unknown samples. Complete a table of the results of mixing A with each of the oxidizing agents, A. B and C, based on the data in Problem 2. Add your predicted results for similar tests on B and C to your table. When a student receives a solution containing one of the anions (call it X'), he can identify the unknown by one or, at most, two tests with the solutions of A, B and C. Write a flow chart to follow as a procedure for the identification.Explanation / Answer
1) Germanium comes below carbon in the periodic table and has greater mass as well as density than carbon.
Silicon comes above germanium but below carbon thus has greater density than carbon but lesser than that of germanium. Similarly, tin comes below germanium and thus has more density that that of carbon,germanium as well as sislicon.
2) A + C- -------> A- + C
Species oxidized = C- ; species reduced = A
A + B- -------> no reaction
Thus, B is better oxidizing agent
In oredr of increasing strength of oxidizing agent:-
C < A < B