Open Question
What is the appropriate name for each ionic compound: a. SnO, b. Cr2S3, c. RbI, d. BaBr2?
3. Chemical Reactions
Naming Ionic Compounds
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What is the correct formula for the ionic compound formed between P^3- and Ca^2+?
A
Ca2P3
B
Ca3P2
C
CaP2
D
CaP
Verified step by step guidance1
Identify the charges of the ions involved: Phosphide ion (P^3-) has a charge of -3, and Calcium ion (Ca^2+) has a charge of +2.
To form a neutral ionic compound, the total positive charge must balance the total negative charge.
Determine the least common multiple of the charges: The least common multiple of 3 and 2 is 6.
Calculate the number of each ion needed to achieve charge balance: You need 3 calcium ions (3 x +2 = +6) and 2 phosphide ions (2 x -3 = -6) to balance the charges.
Write the formula for the compound using the number of each ion: The correct formula is Ca3P2.
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