question 10 (0.5 points) give the best systematic name for the compound cr3p2 __1__ __2__ a. chromium b…
question 10 (0.5 points) give the best systematic name for the compound cr3p2 __1__ __2__ a. chromium b. chromium (iii) c. chromium (ii) d. trichromium e. phosphide f. diphosphide g. triphosphorus h. diphosphorus i. craps
Answer
Explanation:
Step1: Identify cation and anion
The compound $Cr_3P_2$ consists of a metal (cation) and a non - metal (anion). Chromium ($Cr$) is the cation and phosphorus ($P$) forms the anion.
Step2: Determine oxidation state of chromium
In $Cr_3P_2$, phosphorus has an oxidation state of - 3. Let the oxidation state of $Cr$ be $x$. Using the charge - neutrality principle for the compound: $3x+2\times(- 3)=0$. Solving for $x$ gives $3x = 6$, so $x = + 2$.
Step3: Name the compound
The cation is named first with its oxidation state in Roman numerals in parentheses if it is a transition metal. The anion is named second with the ending “-ide”. So the name is chromium(II) phosphide.
Answer:
C. chromium (II), E. phosphide