Chemistry copper cu s 4hno3 aq cu no3 2 aq 2no2 g 2h2o l

Cu + 4hno3 balanced equation

Then, transfer the copper into the different pre-weighed evaporating dish. Write a complete, balanced chemical equation for the following reaction: Solid nickel reacts with aqueous copper II chloride. Show ALL calculations. In this reaction, which element is oxidized, and which element is reduced? What problems would arise from an incomplete reaction? Add nitric acid HNO3. Occasionally swirl the solution until it colorless. Write the balanced equation for this reaction. What kind of reaction is this?

In table format record your qualitative observations for each of the five reactions. How would this error affect your percent yield of Cu? Questions 1.

Cu+hno3=cu(no3)2+no2+h2o net ionic

Both scenarios would cause an exceedingly high percent recovery. On the final washing, transfer the copper into an evaporating dish and decant remaining isopropyl alcohol. What form of copper is present in the beaker after you added the H2SO4? After cooling, reweigh the evaporating dish and recovered copper until the final mass of copper is below and within. The goal of the lab was to recover copper as close to the original copper amount and to demonstrate the Law of Conservation and Mass. However, when the reaction is incomplete, some of the zinc would be left over. Identify and name the reactants and the product s for each reaction. Write balanced chemical equations for each of the five reactions. By washing method, we cannot remove the entire amount of the NaNo3 particles from the CuO particles because of improper dissolution. Questions 1.

It can affect the percent yield of Cu. What ions did you remove when you washed the precipitated copper? What form of copper is present in the beaker after you added the H2SO4?

It changed the percent yield of Cu. During the decantation of the liquid some particle went to the beaker with the liquid so there was loss of some material which decreased the percentage yield of Cu.

cu(no3)2 + naoh

To purify a sample of copper via a number of different types of reactions. After the washing and decantation of the copper oxide, at about 8 mL of sulfuric acid H2SO4 to dissolve the copper oxide.

Stoichiometry is helpful in calculating the amount of an element or compound in chemical reactions.

cu(oh)2=cuo+h2o redox

What problems would arise from an incomplete reaction?

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(DOC) Lab report 7