Which of the following examples is/are an example of a redox reaction as is observed in the lab? all of the choices the combination of the Na2CO3 with the acid HCI to form CO2 gas and the salt NaCI the combination of AGNO3 solution with the CuCl2 solution to form a white precipitate the combination of Mg metal to the acid HCI

A student was asked to identify a compound. In an effort to do so, he first dissolved the compound in water. He found that no precipitate formed when hydrochloric acid was added, but when H2S was bubbled into this acidic solution, a precipitate formed. Which one of the following could be the precipitate? NiS AgCl HgS BaS

If KI was not available to precipitate AgI from AgNO3 then what reagent can be used instead? HNO3 AgNO3 NH3 HI

Please answer all the three the questions as soon as possible Thank you so much! 3. Solid silver nitrite is slowly added to 125 mL of a sodium cyanide solution until the concentration of silver ion is 0.0523 M. The maximum amount of cyanide remaining in solution is  M.

*76. Using data from Table 16.3, calculate the concentrations of Hg²*(aq), HgCl*(aq), and HgCl2(aq) that result when 1.00 L of a 0.100 M Hg(NO3)2 solution is mixed with an equal volume of a 0.100 M HgCl, solution. (Hint: Use the analogy with amphoteric equilibria discussed in Sec- tion 10.8.)

A student carries out the following titration by adding H2SO4.

A solution contains CO32– at a concentration of 0.0023 M and Cl– at a concentration of 0.00076 M. If AgNO3(aq) is added drop by drop to the solution, which ion, CO32– or Cl–, will precipitate first? Give the minimum concentration of Ag+ needed to precipitate each of the

A saturated solution of the hypothetical salt, M2A3, has an initial salt concentration of 0.000466 M. What is the value of Ksp with 3 significant figures.  M2A3 → 2 M3+ + 3 A2-