Scelta multipla
Which of the following is the correct chemical formula for zinc iodide?
105
views
3. Chemical Reactions
Writing Ionic Compounds
Scelta multipla
Which of the following is the correct formula for the compound formed by lead(II) ions and chromate ions?
A
Pb(CrO4)2
B
Pb2CrO4
C
PbCrO4
D
Pb2(CrO4)3
Guida verificata passo dopo passo1
Identify the charges of the ions involved: lead(II) ion is Pb^{2+} and chromate ion is CrO_4^{2-}.
Write down the charges explicitly: Pb^{2+} and CrO_4^{2-}.
Determine the ratio of ions needed to balance the total positive and negative charges so that the compound is electrically neutral.
Since Pb^{2+} and CrO_4^{2-} both have charges of magnitude 2 but opposite signs, one Pb^{2+} ion will balance with one CrO_4^{2-} ion.
Write the formula by combining one Pb^{2+} ion and one CrO_4^{2-} ion without any additional subscripts, resulting in PbCrO_4.
Video correlati
Pratica correlata
