객관식
Which salt is formed when potassium hydroxide (KOH) reacts with sulfuric acid (H2SO4)?
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3. Chemical Reactions
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객관식
Which of the following is the correct chemical formula for magnesium phosphate?
A
Mg(PO4)2
B
Mg3(PO4)2
C
MgPO4
D
Mg2(PO4)3
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검증된 단계별 안내1
Identify the ions involved: magnesium ion is Mg^{2+} and phosphate ion is PO_4^{3-}.
Determine the ratio of ions needed to balance the charges so the compound is electrically neutral.
Set up the charge balance equation: 3 \(\times\) (+2) from Mg^{2+} ions and 2 \(\times\) (-3) from PO_4^{3-} ions, ensuring total charge equals zero.
Write the formula using the correct subscripts based on the ratio found: Mg_3(PO_4)_2.
Verify that the total positive charge equals the total negative charge to confirm the formula is correct.
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