What precipitates form when

Cu(NO3)2, CuSO4, NH4OH, and CaCl2

only two of the above added together. I need all combinations. What color are they? Ik Cu reacts with NH4OH. is the precipitate white?? what about the others?

Most copper salts/ppts are blue, some light blue and others dark blue. Most Ca salts/ppts are white. You need to go through the combinations yourself. We'll be happy to check your work. Go to google and type in the suspected ppt. You can find solubility and color there. Here is a site that is a good starting point for solubility.

http://www.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html

To determine the precipitates that form when different combinations of the given compounds are mixed, we need to consider the solubility rules. These rules indicate which combinations of ions will result in the formation of insoluble compounds, or precipitates.

Let's go through each combination step by step:

1. Cu(NO3)2 (Copper Nitrate) + CuSO4 (Copper Sulfate):
Both compounds contain copper ions (Cu2+). When these two solutions are mixed, no precipitate will form. This is because copper salts are generally soluble in water.

2. Cu(NO3)2 (Copper Nitrate) + NH4OH (Ammonium Hydroxide):
Copper(II) nitrate and ammonium hydroxide will react to form a precipitate. The reaction can be represented as follows:
Cu(NO3)2 (aq) + 2NH4OH (aq) → Cu(OH)2 (s) + 2NH4NO3 (aq)
The precipitate formed is copper(II) hydroxide (Cu(OH)2), which is light blue in color.

3. CuSO4 (Copper Sulfate) + NH4OH (Ammonium Hydroxide):
The reaction between copper(II) sulfate and ammonium hydroxide will also result in the formation of a precipitate. The reaction can be represented as follows:
CuSO4 (aq) + 2NH4OH (aq) → Cu(OH)2 (s) + (NH4)2SO4 (aq)
The precipitate formed in this case is also copper(II) hydroxide (Cu(OH)2), which is light blue.

4. CuSO4 (Copper Sulfate) + CaCl2 (Calcium Chloride):
When copper(II) sulfate reacts with calcium chloride, no precipitate will form. Both compounds are soluble in water.

To summarize:
- When Cu(NO3)2 is mixed with CuSO4, no precipitate forms.
- Mixing Cu(NO3)2 with NH4OH results in the formation of a light blue precipitate (Cu(OH)2).
- Mixing CuSO4 with NH4OH also produces a light blue precipitate (Cu(OH)2).
- No precipitate forms when CuSO4 is mixed with CaCl2.

It's important to note that the solubility and resulting precipitates can vary depending on the concentration and temperature of the solutions.

When different combinations of the given compounds are mixed, the following precipitates are formed:

1. Cu(NO3)2 + CuSO4: No precipitate forms. Both compounds are soluble in water.

2. Cu(NO3)2 + NH4OH: A light blue precipitate of Cu(OH)2 (copper hydroxide) forms. The color is a pale blue.

3. Cu(NO3)2 + CaCl2: No precipitate forms. Both compounds are soluble in water.

4. CuSO4 + NH4OH: A light blue precipitate of Cu(OH)2 (copper hydroxide) forms. The color is a pale blue.

5. CuSO4 + CaCl2: No precipitate forms. Both compounds are soluble in water.

6. NH4OH + CaCl2: A white precipitate of Ca(OH)2 (calcium hydroxide) forms. The color is white.

To summarize:

- Cu(NO3)2 + CuSO4: No precipitate forms.
- Cu(NO3)2 + NH4OH: Light blue precipitate of Cu(OH)2.
- Cu(NO3)2 + CaCl2: No precipitate forms.
- CuSO4 + NH4OH: Light blue precipitate of Cu(OH)2.
- CuSO4 + CaCl2: No precipitate forms.
- NH4OH + CaCl2: White precipitate of Ca(OH)2.