You will prepare and observe a single replacement reaction in this lab. Your reactants will be copper (Cue) and silver nitrate (Again). You will weigh the reactants and the products carefully to determine the ratio of copper and silver that react – in units of mass (g) and number of atoms (moles). The chemical equation for your reaction looks like this: PROCEDURE – day 1 cue(S) + _ Again 1. Obtain a 30 CM length of copper (Cue) wire. Form a coil by wrapping the wire around a large test tube, leaving about 7 CM straight for a handle. Stretch the coil a little so there is some space between the loops.
Weigh the copper coil to he nearest 0. 01 g and record in your data table. 2. We Labeled a clean and dry 250 ml beaker. Weigh the beaker to the nearest 0. 01 g. 3. Weigh the vial of Again powder provided by Mr… Andrews and weigh to the nearest 0. 01 g. 4. We filled the weighed 250 ml beaker with about 100 ml of distilled water. Then added the solid Again to the water and stirred gently with a solid glass rod until all of the Again crystals have dissolved. We then Weighed the empty vial. 5. Bend the end of the copper wire so it can be hung over the edge of the beaker with the coil immersed in the Again solution. 6.
Covered the beaker with a attach glass & stored it in a box until our next class PROCEDURE DAY 2: 7. At the start of our next class, we observed what had happened to the copper and Again. Recorded our observations. 8. Shake the crystals off of the coil and lift the coil from the solution. Use your wash bottle to rinse into the beaker any crystals which stuck to the coil. We set the coil aside & weighed it when it was dry. 9. Let the crystals settle in the beaker. Carefully decant the solution in the sink. Add 5 ml of dilute silver nitrate solution and stir gently until any flecks of copper disappear. Carefully decant again.
How many atoms of solid copper were involved in your experiment? .00976 x 6. 02 x IOWA = 5. 875 x IOWA atoms of solid copper. 3. How many atoms of solid silver were involved in your experiment? .194 x 6. 02 x 10’23 = 1. 167 x IOWA atoms of solid silver 4. What is the relationship between the number of atoms of silver and the number of atoms of copper calculated in questions 2 and 3? IOWA = 1. 986 is the relation. 1. 167 x 5. 875 x IOWA 5. Using the weight of silver nitrate originally given to you, calculate the mass of silver you should have produced. CONCLUSION – Paper is attached to back of Lab Report.