Question

Can someone help me? I was given a lab, that has already been done, to which i need to look over and fill out a data table that wants:

Reactants | Prediction of Reaction Type | Observation | Reaction Type

..of the 5 solutions that have been experimented with (i will put them below). After the table is finished i am needed to answer 3 questions (I will also put this below).

Answer 1

1. Iron (IIII) and copper (II) sulfate solution
Fill a small test tube halfway with copper (II) sulfate solution. Add a 2.0 gram iron rod to the solution and observe the reaction.

2. Lead (II) nitrate and potassium iodide solutions
Pour about 2.0 mL of lead (II) nitrate into the test tube. Add 5 to 10 drops of potassium iodide solution to the test tube and record your observations of the reaction.

3. Magnesium metal and hydrochloric acid solution
Place one scoop of magnesium turnings into the test tube. Add hydrochloric acid slowly and observe the reaction. Next, place a burning splint near the mouth of the test tube to test for the presence of hydrogen gas.

4. Electrolysis of water
Use a U-tube with electrodes at each end, connected to a battery. Fill the U-tube with water. Turning on the battery, observe the results at each electrode. Next, test for hydrogen and oxygen gas produced at each end of the tube.

5. Burning magnesium
Place magnesium ribbon in a clean crucible (on a clay triangle above a Bunsen burner). Heat until the magnesium begins to burn.

Answer 2

and the questions are:

1. Write a balanced equation for each reaction observed in this lab.

2. If you were to measure the mass of magnesium and hydrochloric acid before combining them in the test tube, how would that mass compare to the mass of reactants left in the test tube after the reaction? Explain your answer and how it corresponds to the law of conservation of mass.

3. One of the reactions you conducted can actually be categorized as TWO different types of reactions. Which reaction is this, and what are the two types of reactions?

Answer 3

this is a one complicated question...i can't help with all of it...but let me contribute a little...

1. Iron (IIII) and copper (II) sulfate solution. sounds like copper (II) will oxidize the iron rod and solid copper will deposit on the rod. redox.
2. Lead (II) nitrate and potassium iodide solutions...sounds like precipitation, is lead iodide insoluble?
3. Magnesium metal and hydrochloric acid...Mg gets oxidized by H plus. Splint goes voom!
4. bubbles at each electrode. H2 forms because of reduction, oxygen gas because of oxidation. look up electrolysis of water in a gen-chem book.
5. magnesium gets oxidized by O2 (who doesn't).

Answer 4

wait im lost what are you explaining right there?

Answer 5

i made it really brief because i don't want to ruin the fun for you. if you really have no idea what's going on, then it's time to hit the books again...

Answer 6

For quest 1,2&3, you have to know your reactivity series. for 3 if it the splint burns with a pop sound then hydrogen gas was given off. hope this helps :D