Sodium nitrate reacts with copper (II) hydroxide.

I know how to write it down:
NaNo3+CuOH2----> NO REACTION

The problem is that I don't understand why it's no reaction I know it's double replacement and we have to look at activity series of metal to figure out If we can replace metal or not but isn't Na above Cu in activity series? So why is this no reaction? Shouldn't Na replace Cu?

Can you please explain.

Thanks.

A quickie fix. That is Cu(OH)2.

I'll try. You are right that there is no reaction.
When you talk about the activity series you are talking about single replacement reactions. This is not a SR reaction so none of what you suggested applies. That takes care of that.

When looking at double replacement reactions, a reaction will take place for one of several reasons.
1. A ppt is formed; i.e., an insoluble material is formed. First, Cu(OH)2 is a solid already. IF it reacted the products would be NaOH and Cu(NO3)2 but a quick look at the solubility rules will tell you that both NaOH and Cu(NO3)2 are soluble so #1 is out for a rxn to take place.
2. A gas is formed. Obviously, neither NaOH nor Cu(NO3)2 are gases. So #2 is out.
3. A slightly ionized substance is formed; i.e., a weak electrolyte is formed. Both NaOH and Cu(NO3)2 are strong electrolytes. That lets out #3.
4. Reactions occur if they are redox reaction but this is not one of them.
So there is no driving force for these two compounds to react.

Certainly! When determining whether a reaction will occur between two substances, we need to consider the reactivity or activity series of the elements involved. In this case, sodium (Na) is indeed above copper (Cu) in the reactivity series, which suggests that sodium is more reactive than copper.

However, it's important to note that the activity series is typically useful for predicting reactions between metals and acids or metal displacement reactions, where one metal replaces another metal in a compound. In the reaction you provided, sodium nitrate (NaNO3) is not an acid and copper (II) hydroxide (Cu(OH)2) is not a metal that can be displaced. Therefore, we cannot determine the outcome solely based on the activity series.

Instead, we need to consider the solubility rules. In this case, sodium nitrate is a soluble salt, meaning it dissociates into sodium ions (Na+) and nitrate ions (NO3-) in a water solution. Copper (II) hydroxide, on the other hand, is insoluble, so it remains as a solid in water.

The reaction you wrote:

NaNO3 + Cu(OH)2 → no reaction

indicates that no reaction occurs between the two compounds since they do not react to form any new products. The sodium nitrate remains dissolved as Na+ and NO3- ions, and the copper (II) hydroxide remains as a solid. Therefore, the reaction does not proceed.

In conclusion, the lack of reaction between sodium nitrate and copper (II) hydroxide is due to their different properties and solubilities, rather than the activity series.