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3 years ago

Which anion will form a precipitate with Ca2+

2 answers:

ioda3 years ago

6 0

Answer : Precipitation reactions occur when particular species of cations and anions in an aqueous solution combines to form an insoluble ionic solid which can be called as precipitate.

Here, the anions that will mostly form precipitate with $Ca^{+2}$ are OH anions, Cl ions, Br ions, $SO_{4}$ ions, $C_{2} H_{3} O{2}$ ions.

Calcium has valency of 2 electrons in its valence shell. So, any anion that can satisfy the valency of calcium can form a compound with calcium.

Anika [276]3 years ago

4 0

One example of an anion that will form a precipitate with Ca <em>2+</em> is CO3 <em>2-
</em>The substance formed would be CaCO3 of calcium carbonate.<em>
</em>

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3 years ago

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What is the mass of 3.20x10^23 formula units of iron (III) oxide (Fe2O3)?

yaroslaw [1]

The mass of iron (III) oxide (Fe2O3) : 85.12 g

<h3>Further explanation</h3>

Given

3.20x10²³ formula units

Required

The mass

Solution

1 mole = 6.02.10²³ particles

Can be formulated :

N = n x No

N = number of particles

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$\tt n=\dfrac{3.2.10^{23}}{6.02.10^{23}}=0.532$

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2 years ago

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3 years ago

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Explanation:

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Explanation:

Expression for rate law for first order kinetics is given by: