i have to write lab report based on my determination of chemical formula & in lab we did experiment & found out the formula was cucl2*2h2o, in my lab report i have to start with mole to mole ratio how can i start writing that?

I can't tell from your post what you've done or how you did it.

To start writing about the mole-to-mole ratio in your lab report, follow these steps:

1. Understand the concept: A mole-to-mole ratio relates the number of moles of one substance to the number of moles of another substance in a chemical reaction. It is based on the balanced chemical equation for the reaction.

2. Determine the balanced chemical equation: Look at the experimental procedure and observations to determine the chemical reaction that occurred. In this case, the formula was determined to be CuCl2*2H2O. For simplicity, let's assume the reaction involves the CuCl2 compound. Find or come up with the balanced chemical equation for the reaction involving CuCl2.

3. Identify the substances involved: In the balanced chemical equation, identify the substances you want to establish a mole-to-mole ratio for. For example, if the reaction involves CuCl2 and another substance, such as HCl, water, or any other compound, focus on those substances.

4. Determine the coefficients: Once you have identified the substances, the coefficients in the balanced chemical equation represent the mole-to-mole ratio. For example, if the balanced chemical equation is:

CuCl2 + 2HCl → CuCl2 + 2H2O

The mole-to-mole ratio between CuCl2 and HCl is 1:2.

5. Write the mole-to-mole ratio statement: In your lab report, introduce the mole-to-mole ratio by stating the balanced chemical equation and then specify the ratio you obtained. For example:

"Based on the balanced chemical equation for the reaction involving CuCl2, the mole-to-mole ratio between CuCl2 and HCl was determined to be 1:2, indicating that for every 1 mole of CuCl2, 2 moles of HCl were consumed."

6. Provide reasoning or interpretation: After stating the mole-to-mole ratio, explain the significance of this ratio in terms of the reaction or the stoichiometry of the reaction.

7. Use proper referencing: If you used any external sources or references to determine the balanced chemical equation or mole-to-mole ratio, make sure to cite them appropriately in your lab report.

Remember, your lab report should adhere to the specific guidelines provided by your instructor or institution.