What is the net ionic equation for NaOH and cuso4?

You're dealing with a double replacement reaction in which two soluble ionic compounds react to form an insoluble solid that precipitates out of the aqueous solution.

In your case, sodium hydroxide, #"NaOH"#, and copper(II) nitrate, #"Cu"("NO"_3)_2#, will dissociate completely in aqueous solution to form cations and anions

#"NaOH"_text((aq]) -> "Na"_text((aq])^(+) + "OH"_text((aq])^(-)#

#"Cu"("NO"_3)_text(2(aq]) -> "Cu"_text((aq])^(2+) + 2"NO"_text(3(aq])^(-)#

The reaction will produce copper(II) hydroxide, #"Cu"("OH")_2#, an insoluble ionic compound that precipitates out of solution, and aqueous sodium nitrate, #"NaNO"_3#, another soluble ionic compound.

The balanced chemical equation for this reaction would look like this

#2"NaOH"_text((aq]) + "Cu"("NO"_3)_text(2(aq]) -> "Cu"("OH")_text(2(s]) darr + 2"NaNO"_text(3(aq])#

Now, notice that you need #2# moles of sodium hydroxide for every #1# mole of copper(II) nitrate that takes part in the reaction.

To get the complete ionic equation, rewrite the soluble ionic compounds as cations and anions

#2 xx overbrace(("Na"_text((aq])^(+) + "OH"_text((aq])^(-)))^(color(purple)("NaOH")) + overbrace(("Cu"_text((aq])^(2+) + 2"NO"_text(3(aq])^(-)))^(color(red)("Cu"("NO"_3)_2)) -> "Cu"("OH")_text(2(s])# #darr# #+ 2 xx underbrace(("Na"_text((aq])^(+) + "NO"_text(3(aq])^(-)))_color(blue)("NaNO"_3)#

This is equivalent to

#2"Na"_text((aq])^(+) + 2"OH"_text((aq])^(-) + "Cu"_text((aq])^(2+) + 2"NO"_text(3(aq])^(-) -> "Cu"("OH")_text(2(s]) darr + 2"Na"_text((aq])^(+) + 2"NO"_text(3(aq])^(-)#

Now, in order to get the net ionic equation, you must eliminate spectator ions, i.e. ions that are present on both sides of the equation

In this case, you would have

#color(red)(cancel(color(black)(2"Na"_text((aq])^(+)))) + 2"OH"_text((aq])^(-) + "Cu"_text((aq])^(2+) + color(red)(cancel(color(black)(2"NO"_text(3(aq])^(-)))) -> "Cu"("OH")_text(2(s]) darr + color(red)(cancel(color(black)(2"Na"_text((aq])^(+)))) + color(red)(cancel(color(black)(2"NO"_text(3(aq])^(-))))#

which is equivalent to

#2"OH"_text((aq])^(-) + "Cu"_text((aq])^(2+) -> "Cu"("OH")_text(2(s]) darr#

Copper(II) hydroxide is a blue insoluble solid that precipitates out of solution.

CuSO4 + NaOH → Cu(OH)2 + Na2SO4

Word equation: Copper (II) Sulfate plus Sodium Hydroxide → Copper (II) hydroxide + Sodium sulfate

Type of Chemical Reaction: For this reaction we have a double replacement reaction.

Balancing Strategies: To balance this reaction be sure to count all of the oxygen atoms on both sides of the equation.

Reactants:

• CuSO4 – Copper(II) sulfate
  
  
  • Other names: Cupric sulphate
    
    
    , Blue vitriol (pentahydrate)
    
    , Bluestone (pentahydrate)
    
    Bonattite (trihydrate mineral)
    
    , Boothite (heptahydrate mineral)
    
    , Chalcanthite (pentahydrate mineral)
    
    , Chalcocyanite (mineral)
    
    , Cupric sulfate
    
    , Copper sulfate (anhydrous)
    
    , CuSO4
    
    , Copper sulfate
    
    , Cupric sulfate anhydrous
    
    , Copper monosulphate
    
    , Copper sulfate (1:1)
    
    , Cupric sulphate anhydrous
    
    , Copper sulphate
    
    , Copper(2+) sulfate
    
    , Copper(II) sulphate
    
    , Copper monosulfate
    
    , Cupric sulfate, anhydrous
    
    , Cupric sulphate, anhydrous
    
    , Sulfuric acid, copper(2+) salt(1:1)
    
  • Appearance: Gray-white (anhydrous) | blue (pentahydrate)
    
    ; White hygroscopic crystals
    
• NaOH
  • Names: Sodium hydroxide
    
    
    
    
    , Caustic soda
    
    
    
    , Lye
    
    Soda lye
    
    
    
    , Sodium hydrate
    
    
    
    , NaOH
    
    , White caustic
    
    , Lye [Sodium hydroxide]
    
  • Appearance: White, waxy, opaque crystals
    
    ; White hygroscopic solid in various forms
    
    ; Colorless to white, odorless solid (flakes, beads, granular form).
    

Products:

• Cu(OH)2 – Copper(II) hydroxide
  
  • Other names: Cupric hydroxide
    
    
    , Cu(OH)2
    
  • Appearance: Blue or blue-green solid
    
• Na2SO4
  • Names: Sodium sulfate
    
    
    
    , Sodium sulphate
    
    
    , Sulfate of sodium
    
    Thenardite (mineral)
    
    , Glauber's salt (decahydrate)
    
    , Sal mirabilis (decahydrate)
    
    , Mirabilite (decahydrate mineral)
    
    , Disodium sulfate
    
    
    
    , Anhydrous sodium sulfate
    
    , Sodium sulfate anhydrous
    
    
    , Sodium sulfate, anhydrous
    
    , Sodium sulphate anhydrous
    
    , Sodium sulphate, anhydrous
    
    , Sulfuric acid disodium salt, anhydrous
    
    , Disodium sulphate
    
    , Salt cake
    
    , Na2SO4
    
    , Sulfuric acid disodium salt
    
  • Appearance: White crystalline solid | hygroscopic
    
    ; White hygroscopic solid in various forms