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Mole Concept & Avogadro Number

How do Ca2+...

Question

How do $C a^{2 +}$ and $(P O_{4})^{3 -}$ combines to make an electrically neutral compound?

Three

C a^{2 +}

ions combine with two

(P O_{4})^{3 -}

ions

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You add all of the electrons together and divide by two.

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Two

C a^{2 +}

ions combine with three

(P O_{4})^{3 -}

ions

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Four

C a

ions combine with two

P

ions and eight

O

ions

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None of the above

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Solution

The correct option is A Three $C a^{2 +}$ ions combine with two $(P O_{4})^{3 -}$ ions
$3 C a^{2 +} + 2 P O_{4}^{3 -} \to C a_{3} (P O_{4})_{2}$
$∴$ 3 $C a^{2 +}$ ions combines with 2 $(P O_{4})^{3 -}$ combine to make an electrically neutral compound by cross multiplication of their charges.

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Similar questions

Question 13
Write the molecular formulae of all the compounds that can be formed by the combination of following ions
$C u^{2 +}, N a^{+}, F e^{3 +}, C l^{-}, S O_{4}^{2}, P O_{4}^{3 -}$

Q. Assertion :A solution containing

C a^{2 +} (a q)

and

H C O_{3}^{-} (a q)

ions is said to be hard. Reason: The

C a^{2 +}

ions give precipitates (scum) with soaps. On heating the

H C O_{3}

ions revert to

C O_{3}^{2 -}

which gives a precipitate with

C a^{2 +}

ions.

Q. How many glycinate ions are required to make an octahedral complex with a

C a^{2 +}

ion?

In fluorite structure (CaF₂)

H^{+}

ions and

O H^{-}

ions combine to form neutral water molecules in a neutralization reaction.

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How do Ca2+ and (PO4)3− combines to make an electrically neutral compound?

The correct option is A Three Ca2+ ions combine with two (PO4)3− ions3Ca2++2PO3−4→Ca3(PO4)2∴ 3 Ca2+ ions combines with 2 (PO4)3− combine to make an electrically neutral compound by cross multiplication of their charges.

How do $C a^{2 +}$ and $(P O_{4})^{3 -}$ combines to make an electrically neutral compound?

The correct option is A Three $C a^{2 +}$ ions combine with two $(P O_{4})^{3 -}$ ions
$3 C a^{2 +} + 2 P O_{4}^{3 -} \to C a_{3} (P O_{4})_{2}$
$∴$ 3 $C a^{2 +}$ ions combines with 2 $(P O_{4})^{3 -}$ combine to make an electrically neutral compound by cross multiplication of their charges.