Question

for each pair below, decide whether the name and formula are correctly written and match. provide a corrected version for any mismatch or if either the name or formula is incorrect. if there is no mistake in the pair, write none.
a nio₂ nickel dioxide
b li₃p lithium phosphide
c tio₂ titanium(iv) oxide
d naco₃ sodium carbonate
e nio nickel(ii) oxide
f srcl₂ strontium(ii) chloride

Explanation:

Step1: Analyze nickel dioxide

Nickel can have +2 and +4 oxidation states. In nickel dioxide ($NiO_2$), nickel has a +4 oxidation state, and the name and formula match. Answer is none.

Step2: Analyze lithium phosphide

Lithium has a +1 charge ($Li^+$) and phosphide has a - 3 charge ($P^{3 -}$). The correct formula for lithium phosphide is $Li_3P$, so the given formula $LiP$ is incorrect. The corrected version is $Li_3P$.

Step3: Analyze titanium(IV) oxide

Titanium(IV) has a +4 charge ($Ti^{4+}$) and oxygen has a -2 charge ($O^{2-}$). The correct formula is $TiO_2$, so the given formula $Ti_4O$ is incorrect. The corrected version is $TiO_2$.

Step4: Analyze sodium carbonate

The formula for sodium carbonate is $Na_2CO_3$, not $NaCO_3$. The corrected version is $Na_2CO_3$.

Step5: Analyze nickel(II) oxide

Nickel(II) has a +2 charge ($Ni^{2+}$) and oxygen has a -2 charge ($O^{2-}$), the formula $NiO$ is correct. Answer is none.

Step6: Analyze strontium(II) chloride

Strontium(II) has a +2 charge ($Sr^{2+}$) and chloride has a -1 charge ($Cl^-$), the formula $SrCl_2$ is correct. Answer is none.

Answer:

a. none
b. $Li_3P$
c. $TiO_2$
d. $Na_2CO_3$
e. none
f. none