Write the formulas of the compounds formed by NH4+ with the following anions: CN−, HCO3−, SO42−, HPO42−
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To determine the formulas of the compounds formed by NH4+ with different anions, we need to consider the charges of the ions and balance them to form neutral compounds.
1. NH4+ with CN−:
Since NH4+ has a charge of +1 and CN− has a charge of -1, they combine to form an electrically neutral compound. The formula for this compound is NH4CN.
2. NH4+ with HCO3−:
NH4+ has a charge of +1, and HCO3− has a charge of -1. To balance the charges, we need two NH4+ ions for every one HCO3− ion. Therefore, the formula for this compound is (NH4)2CO3.
3. NH4+ with SO42−:
NH4+ has a charge of +1, and SO42− has a charge of -2. To balance the charges, we need two NH4+ ions for every one SO42− ion. The formula for this compound is (NH4)2SO4.
4. NH4+ with HPO42−:
NH4+ has a charge of +1, and HPO42− has a charge of -2. To balance the charges, we need two NH4+ ions for every one HPO42− ion. The formula for this compound is (NH4)2HPO4.
Remember, when writing formulas for compounds, it's crucial to consider the charges of ions and ensure that they balance to maintain electrical neutrality.
NH4CN
(NH4)2SO4
Make the charges add to zero.
You see +1 charge for NH4 and -1 charge for CN.
You see +2 charge for NH4 and -2 charge for SO4.