Multiple Choice
Which of the following is the correct chemical formula for sodium phosphate?
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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
KOH
C
K2H
D
K2H2
Verified step by step guidance1
Identify the ions involved: Potassium (K) is a metal that typically forms a +1 cation (K\^+), and hydride (H) is the anion formed by hydrogen gaining an electron, resulting in H\^-.
Determine the charges of the ions: Potassium ion has a charge of +1, and hydride ion has a charge of -1.
Combine the ions in a ratio that balances the total positive and negative charges to make a neutral compound. Since both have charges of magnitude 1 but opposite signs, they combine in a 1:1 ratio.
Write the chemical formula by placing the cation first followed by the anion, resulting in KH.
Verify that the formula represents a neutral compound with balanced charges, confirming KH as the correct formula for potassium hydride.
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