The final product of this reaction, [Cu(NH 3) 4]SO 4 H 20 is soluble in water. What will you add to the solution after you add the concentrated ammonia to cause this product to precipitate out of solution? 95% ethanol methanol isopropyl alcohol Nothing will be added. The precipitate will form when the solution is cooled in an ice bath. Nothing will be added. The precipitate that we will isolate will form as the concentrated NH3 is added to the solution of [Cu(H₂O)4]²+ QUESTION 6 You will isolate the [Cu(NH 3) 4]SO 4 H 20 product before you leave the lab on Day #1, but you will not weigh your product to determine the yield until Day #2. Why is it necessary to wait until the next lab period before you weigh the product to determine the yield? This is a long experiment, and there won't be time to weigh the product before class ends on Day #1. We wait to weigh the product to allow time for any water and/or ethanol to evaporate completely. If the product is "wet", the measured yield will be too high. ○ It will take several days for the solid to precipitate after we add the ethanol. It is not necessary to wait several to determine the yield. The mass of product isolated can be determined on Day #1.

5. A reaction is initiated by mixing suflur dioxide and oxygen. This reaction forms sulfur trioxide. 2 SO2 + O2 5 2 SO3 if we start the reaction with 0.100 M SO2 and 0.150 M O2, and allow the reaction to run until the concentration of SO3 is 0.020 M, what is the concentration of O2 and SO3 in the mixture at that point?

the equilibrium expressions for the following reactions:   2Fe(s)      +        3H2O(g)   ↔        Fe2O3(s)     +    3 H2(g)   A [Fe2O3][H2]      = Keq [Fe][H2O]   B [Fe2O3][H2]3     = Keq [Fe]2 [H2O]3   C [H2]3     = Keq [H2O]3   D   [Fe]2 [H2O]3     = Keq [Fe2O3][H2]3

An equilibrium reaction between chromate ions, CrO4 2- (yellow), and H+ ions is established to produce dichromate, Cr₂072- (orange). Note the colours. A student adds NaOH to a test tube containing an orange mixture of the above reagents. What is observed? 01. The solution turns from orange to yellow O 2.A precipitate forms 3. The solution tuimns from orange to colourless O4. The solution remains orange

Explain answer with shown work.

In the following equation, if you have a pink solution and you want it to turn blue, what can you do?

The final product of this reaction, [Cu(NH3)4]SO4 H₂O is soluble in water. What will you add to the solution after you add the concentrated ammonia to cause this product to precipitate out of solution? 95% ethanol methanol isopropyl alcohol Nothing will be added. The precipitate will form when the solution is cooled in an ice bath. O Nothing will be added. The precipitate that we will isolate will form as the concentrated NH3 is added to the solution of [Cu(H₂O)4]²+

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