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Sagot :
Sure, let's determine the chemical formula of copper(II) phosphate step-by-step.
1. Identify the charges of the ions involved:
- Copper(II) ion has a charge of [tex]\( +2 \)[/tex]: [tex]\( \text{Cu}^{2+} \)[/tex].
- Phosphate ion has a charge of [tex]\( -3 \)[/tex]: [tex]\( \text{PO}_4^{3-} \)[/tex].
2. Determine the least common multiple (LCM) of the charges (2 and 3):
- The LCM of 2 and 3 is 6. This means we want the total positive charges and the total negative charges to sum up to 6 so that the compound is neutral.
3. Calculate the number of each ion needed to balance the charges:
- To reach a total positive charge of +6 using copper ions ([tex]\( \text{Cu}^{2+} \)[/tex]), we need 3 copper ions: [tex]\( 3 \times +2 = +6 \)[/tex].
- To reach a total negative charge of -6 using phosphate ions ([tex]\( \text{PO}_4^{3-} \)[/tex]), we need 2 phosphate ions: [tex]\( 2 \times -3 = -6 \)[/tex].
4. Write the chemical formula:
- Since we need 3 copper ions and 2 phosphate ions, the chemical formula for copper(II) phosphate is [tex]\( \text{Cu}_3(\text{PO}_4)_2 \)[/tex].
Thus, the correct answer is:
[tex]\[ \text{D. } \text{Cu}_3(\text{PO}_4)_2 \][/tex]
1. Identify the charges of the ions involved:
- Copper(II) ion has a charge of [tex]\( +2 \)[/tex]: [tex]\( \text{Cu}^{2+} \)[/tex].
- Phosphate ion has a charge of [tex]\( -3 \)[/tex]: [tex]\( \text{PO}_4^{3-} \)[/tex].
2. Determine the least common multiple (LCM) of the charges (2 and 3):
- The LCM of 2 and 3 is 6. This means we want the total positive charges and the total negative charges to sum up to 6 so that the compound is neutral.
3. Calculate the number of each ion needed to balance the charges:
- To reach a total positive charge of +6 using copper ions ([tex]\( \text{Cu}^{2+} \)[/tex]), we need 3 copper ions: [tex]\( 3 \times +2 = +6 \)[/tex].
- To reach a total negative charge of -6 using phosphate ions ([tex]\( \text{PO}_4^{3-} \)[/tex]), we need 2 phosphate ions: [tex]\( 2 \times -3 = -6 \)[/tex].
4. Write the chemical formula:
- Since we need 3 copper ions and 2 phosphate ions, the chemical formula for copper(II) phosphate is [tex]\( \text{Cu}_3(\text{PO}_4)_2 \)[/tex].
Thus, the correct answer is:
[tex]\[ \text{D. } \text{Cu}_3(\text{PO}_4)_2 \][/tex]
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