Question

information page (click the link to access the information page. the information page will open in a different tab. to go back to the exam, click on the previous tab). question 2 (5 points) what is the name of cu₃p according to the nomenclature rules? a) copper(iii) phosphide b) tricopper phosphide c) copper(i) phosphide d) copper phosphide e) copper(iii) phosphate

Explanation:

To name \( \ce{Cu3P} \), we first identify the ions. Phosphide ion is \( \ce{P^{3-}} \). Let the oxidation state of Cu be \( x \). For the compound to be neutral: \( 3x + (-3) = 0 \), so \( 3x = 3 \) and \( x = +1 \). So copper has a +1 oxidation state (copper(I)), and the anion is phosphide (\( \ce{P^{3-}} \)). The formula is \( \ce{Cu3P} \), so the name is Copper(I) phosphide. Option c matches this.

Answer:

c) Copper(I) phosphide