Ia a iron (iii) and copper (ii) solution what are the following? what are the reactants, the prediction reaction type?
detail: iron () 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. the observation is that the iron to the solution turned red-ish, lava-like color.

The above given is a displacement reaction

 In which one metal relocates other metal couple change in their electrode chemical potential occurs

if you liken the electrode potential values it will tell the reaction type

The featoms has affinity to lose electron and it  get transformed into ions where as copper has tendency to get reduced and converted to copper metal a as result  we will see brown ppt which is nothing but copper metal

Fe-0.044 -ve shows inclination to lose electron

Cu+0.34 + ve indicates tendency to gain electron in these case
hope it helps

The answer to your question really depends on three things: how much water you have, how cold it is to start out, and how cold the things around it are. water actually freezes when it gets to 32 degrees fahrenheit (0 degrees celsius), but the time it takes to get there may be different.  let's start with the first. if you take two glasses, and fill one with a tiny bit of water, and the other about halfway, then put them both in the freezer, the one with less water will freeze first (you can try this at home, but i recommend using plastic cups and not glass ones).  now let's move on to the second part. let's say you have two glasses, and you fill one with really cold water that has been in the refrigerator, and the other with really hot water from the sink. if you put both of them in the freezer, the one that started out colder will freeze first.  for the third part, let's imagine that you have two glasses with the same amount of water in them, and the water is at the same temperature. imagine putting one outside on a really really cold day in georgia, and having a friend in alaska put one outside on the same day. since it would be so much colder in alaska, the glass of water there would freeze before yours.  so, if you took a tiny bit of really cold water in a glass, and put it outside on a cold day in alaska, it would freeze a lot faster than a big glass of hot water outside on a cold day in georgia.