how to prepare CO from this equation in the lab CaCo3 + 2HCl → CaCl2+H2O+ CO2 (g)

Or CaCo3 ----(Heat 500 to 600 C0→ Cao +Co2 (g)
2- CO2 + H2 → CO (s) + H2O(g)

I don't see a question here.

the question is how to work in the lab

by using these equation to get CO , i have CaCo3 powder and i do not have any idea to prepare CO

https://en.wikipedia.org/wiki/Carbon_monoxide#Laboratory_preparation

Look under lab preparation. Zn + CaCO3 ==> ?
By the way, CO is a gas, not a solid. My best guess is that you have a problem/task and this is just one part of it. Instead of posting the entire problem you have posted just part of it. If this is the case, posting the entire problem would make it easier to see where we're trying to go with this.

To prepare CO (carbon monoxide) in the lab from the given equations, you have two options:

Option 1: Using CaCO3 and HCl
1. Take CaCO3 (calcium carbonate) and add it to a reaction vessel in the lab.
2. Measure and add a suitable amount of HCl (hydrochloric acid) to the reaction vessel containing CaCO3.
3. The reaction between CaCO3 and HCl will produce several products, including CO2 (carbon dioxide) gas.
4. Collect the CO2 gas by using a suitable collection method. For example, you can use a gas syringe or a water displacement method to collect the gas.
5. CO2 gas can be converted into CO in a separate reaction (Option 2).

Option 2: Using CaCO3 and heat
1. Take CaCO3 (calcium carbonate) in a reaction vessel.
2. Heat the reaction vessel containing CaCO3 at a temperature between 500 to 600 degrees Celsius.
3. Upon heating, CaCO3 will undergo thermal decomposition, resulting in the formation of CaO (calcium oxide) and CO2 gas.
4. Collect the CO2 gas using the same methods mentioned in Option 1.

To convert CO2 to CO:
1. Take the collected CO2 gas from either Option 1 or Option 2 and introduce it to another reaction vessel.
2. Add H2 (hydrogen gas) to the reaction vessel containing CO2 gas.
3. The reaction between CO2 and H2 will produce CO (carbon monoxide) gas and H2O (water) vapor.
4. Collect the CO gas using a suitable collection method. For instance, you can use a gas syringe or a gas bag to store the CO gas while allowing the water vapor to escape.

It's important to note that both methods involve handling hazardous chemicals and high temperatures. Therefore, appropriate safety precautions, such as using proper lab equipment and following safety guidelines, should be taken while performing these experiments.