A fine copper wire might not provide enough copper metal to react with all of the silver. Precautions Wear safety goggles and lab apron; silver nitrate will stain clothes and skin.
When the CuO was washed, the excess hydroxide ions that could have remained from the previous reaction were removed. How would the calculated mole ratio be affected if the silver were not completely dry when weighed? It would be too high; the mass of the water would be thought to be silver.
This states that in a chemical reaction, matter can neither be created or destroyed, or more simply, the mass of the products must equal the mass of the reactants. The function of using the ice bath in this step is to control the temperature of the reaction, because the reaction may become too violent if nothing is used to cool it down.
Find the mole ratio of copper to silver in this reaction round to the nearest whole number. In many areas, there are sufficient chloride ions in tap water to react with the silver ion to produce a cloudy precipitate. Continue boiling until nearly dry. Collect crystals by filtration.
Redissolve and filter one more time.
This solution is acceptable for any qualitative use of silver nitrate solution. Except for the silver metal, other materials may be disposed of with routine trash.
Do not pour any silver compounds into the sink. After going back and analyzing the reactions in the lab, we concluded that he majority of the sources of error in the lab would cause a loss of copper and a decrease in the final mass. Sources of Error According to the Law of Conservation of Mass, the mass of the products must equal the mass of the reactants, so logically one would expect that if 2 g of copper was used to start the lab, the lab would result in 2 g of copper.
Test your wire before allowing students to begin. Disposal The copper solution may be disposed of at the sink in most communities. The reaction that occurred in step 7 was a dehydration reaction. In this lab, we tested this by putting copper through five different reactions and many phase changes.
There were many possibly sources of error in the lab that could have been due to incorrect measurement from systemic or random error.
Silver metal does not react with skin. Soak the silver with a small amount of excess silver nitrate solution for 24 hours to react small particles of copper that may have broken off. Find the number of moles of copper consumed during the reaction. The reaction between the excess zinc and sulfuric acid in step 9 is essential to ensure that there is so un-reacted solid zinc mixed in with the copper, and that any excess zinc is reacted to form zinc sulfate than is aqueous and can be poured out with water.
Find the number of moles of silver produced. After the lab was finished, the final mass of the copper was 6. Hydrogen gas is also formed and released. Use distilled or deionized water.After sulfuric acid was added to the beaker, copper was found as copper ions with a 2+ charge instead of the previous copper(ii) oxide form.
6. In the final step of the lab when the copper precipitate was washed, zinc ions were removed. Jan 09, · Best Answer: 1. Copper was left over at the end of the reaction, so silver nitrate was the limiting reactant. 2. Copper was left over at the end of the reaction, copper was in billsimas.com: Resolved.
Mass of silver nitrate = g Mass of copper coil before reaction = g Mass of copper coil after reaction = g Wear safety goggles and lab apron; silver nitrate will stain clothes and skin.
Flush with water in the event of contact. Wear goggles, gloves, and an apron. Copper / Silver Nitrate lab Part deux Write down your observations of the beaker and it's contents Ring the bell - grabbing the hook part of the copper coil ring it like a hand bell in the beaker to knock the crystals off of the copper coil that is remaining Rinse the remaining crystals from the.
Copper and Silver Nitrate- Mike Liu Objective- To determine if the copper reacted was copper (I) or copper (II) ProcedureWeigh. a Packet containing silver nitrate and transfer the AgNo3 into a small 50 mL beaker containing 15 ml of distilled water.1/5(1).
Apr 28, · A reaction between excess copper and a solution of silver nitrate. The data can be used, along with the balanced chemical equations, to determine whether copper .Download