Question

Write the formula for each of the following compounds: h. copper(I) chloride

Answer 1

The formula for copper(I) chloride is CuCl.

To determine the formula, we need to understand the valencies of the elements involved. Copper (Cu) in its +1 oxidation state, also known as copper(I), has a valency of 1, meaning it can form one bond. Chlorine (Cl) typically has a valency of 1, indicating that it can also form one bond.

In copper(I) chloride, one copper(I) ion combines with one chloride ion to form the compound. The formula CuCl represents this combination, indicating one copper(I) ion and one chloride ion.

It's important to note that the subscripts in the formula represent the number of ions or atoms present in the compound. In this case, there is no subscript for copper because it is implied to be 1. The absence of a subscript for chloride also implies that it is 1. If the formula were written as CuCl2, it would indicate the presence of two chloride ions, which would not match the charge of copper(I).

Remember, when writing chemical formulas, it's crucial to consider the valencies and the number of ions or atoms involved to accurately represent the compound.

Answer 2

Answer: CuCl

Step-by-step explanation:

When we have a Roman numeral after a transition metal, that indicates the transition metal's charge. We have I after copper, and I is 1, so copper's charge is 1+, or just +:

Cu⁺

Chloride is in group 17, and elements in group 17 have a charge of 1-, or just -:

Cl⁻

So, we have our charges of 1+ and 1-, and a balanced chemical formula means that the charges are balanced, or that the sum of the charges is 0. -1 + 1 = 0, so we do not need to add any subscripts.

So, our final formula is CuCl.

I hope this helps! :)