Multiple Choice
What is the chemical formula for the compound formed between tin(IV) ions and chloride ions?
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3. Chemical Reactions
Naming Ionic Compounds
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Which of the following is the correct chemical formula for potassium hydride?
A
KH
B
K2H2
C
K2H
D
KH2
Verified step by step guidance1
Step 1: Identify the ions involved. Potassium (K) is an alkali metal that typically forms a +1 cation (K\^{+}), and hydride (H) is the anion formed by hydrogen gaining an electron, resulting in H\^{−}.
Step 2: Determine the ratio of ions needed to balance the charges. Since potassium has a +1 charge and hydride has a -1 charge, they combine in a 1:1 ratio to form a neutral compound.
Step 3: Write the chemical formula by placing the cation first followed by the anion, using subscripts to indicate the number of each ion if more than one is needed. Here, since the charges balance 1:1, no subscripts are necessary.
Step 4: Confirm that the formula represents a neutral compound by ensuring the total positive charge equals the total negative charge.
Step 5: Compare the options given and select the formula that matches the 1:1 ratio of potassium to hydride ions, which is KH.
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