Using the activity series (Table 4.5), write balanced chemical equations for the following reactions. If no reaction occurs, simply write No Reaction. Chromium metal is immersed in an aqueous solution of cobalt(II) chloride.
Why did the chromium metal go to the party? Because it heard there would be a good 'cobalt' of fun!
In all seriousness, let's write the balanced chemical equation for this reaction.
The activity series tells us that chromium (Cr) is less reactive than cobalt (Co). Therefore, no reaction will occur in this case.
So, the balanced chemical equation would be:
No Reaction
I know, it's a bit disappointing. But don't worry, there are many more chemistry reactions out there to make us laugh!
To determine whether a reaction will occur between chromium metal and cobalt(II) chloride, we need to consult the activity series. Here is Table 4.5, the activity series, for reference:
Activity series:
Lithium
Potassium
Barium
Strontium
Calcium
Sodium
Magnesium
Aluminum
Manganese
Zinc
Chromium
Iron
Cobalt
Nickel
Tin
Lead
Hydrogen
Copper
Mercury
Silver
Platinum
Gold
From the activity series, we can see that chromium is below cobalt, which means chromium is less reactive than cobalt. Therefore, no reaction will occur between chromium metal and cobalt(II) chloride.
The balanced chemical equation for this reaction will be:
No Reaction
To determine the balanced chemical equation for the reaction between chromium metal and an aqueous solution of cobalt(II) chloride using the activity series, you need to consider the relative reactivity of the two elements.
First, let's look at the activity series (Table 4.5). The activity series lists metals in order of their reactivity, with the most reactive metals listed at the top and the least reactive metals at the bottom. Chromium (Cr) is less reactive than cobalt (Co) according to the activity series.
Since chromium is less reactive than cobalt, no reaction will occur. In this case, you would write "No Reaction."
Look at the table referenced. The acitvity series of metals will tell you if a reacton occurs.
If the metal is ABOVE the other metal ION, in the reaction then a reaction will occur inwhich themetal goes to its ion and the metal ion goes to its metal. For example, in the reaction Zn + CuCl2 ==>
Notice the metal Zn is ABOVE the Cu^2+ ION; therefore, a reaction will occur and Zn(s) + CuCl2(aq) ==> ZnCl2(aq) + Cu(s)