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earnstyle [38]
3 years ago
5

Review Part B Solutions of sodium carbonate and silver nitrate react to form solid silver carbonate and a solution of sodium nit

rate. A solution containing 3.30 g of sodium carbonate is mixed with one containing 4.71 of silver nitrate How many grams of silver nitrate are present after the reaction is complete? V AE R O ? Submit Request Answer
Chemistry
1 answer:
Ghella [55]3 years ago
4 0

Answer:

0 g

Explanation:

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Given: For sodium carbonate

Given mass = 3.30 g

Molar mass of sodium carbonate= 105.9888 g/mol

Moles of sodium carbonate = 3.30 g / 105.9888 g/mol = 0.03114 moles

Given: For silver nitrate

Given mass = 4.71 g

Molar mass of silver nitrate = 169.87 g/mol

Moles of silver nitrate = 4.71 g / 169.87 g/mol = 0.02773 moles

According to the given reaction:

Na_2CO_3+2AgNO_3\rightarrow Ag_2CO_3+2NaNO_3

1 mole of sodium carbonate react with 2 moles of silver nitrate

0.03114 moles  of sodium carbonate react with 2*0.03114 moles of silver nitrate

Moles of silver nitrate = 0.06228 moles

Available moles = 0.02773 moles

Limiting reagent is the one which is present in small molar amount. It got exhausted at the end of the reaction and the formation of the products is governed by it.

Thus, 0.02773 < 0.06228 moles, Silver nitrate is the limiting reagent and will not left at the end  of the reaction.

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Identify the solute with the highest van't Hoff factor. And how do you determine which one is highest?
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Answer : The correct option is, (A) AlCl_3

Explanation :

Van't Hoff factor : It is defined as the ratio of the experimental value of the colligative property to the calculated value of the colligative property.

We can determine the van't Hoff factor by the association and dissociation of the compound.

(A) AlCl_3

It is an electrolyte that dissociates to give aluminum ion and chloride ion.

The dissociation of AlCl_3 will be,

AlCl_3\rightarrow Al^{3+}+3Cl^{-}

So, Van't Hoff factor = Number of solute particles = Al^{3+}+3Cl^{-} = 1 + 3 = 4

(B) KI

It is an electrolyte that dissociates to give potassium ion and iodide ion.

The dissociation of KI will be,

KI\rightarrow K^{+}+I^{-}

So, Van't Hoff factor = Number of solute particles = K^{+}+I^{-} = 1 + 1 = 2

(C) CaCl_2

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The dissociation of CaCl_2 will be,

CaCl_2\rightarrow Ca^{2+}+2Cl^{-}

So, Van't Hoff factor = Number of solute particles = Ca^{2+}+2Cl^{-} = 1 + 2 = 3

(D) MgSO_4

It is an electrolyte that dissociates to give magnesium ion and sulfate ion.

The dissociation of MgSO_4 will be,

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So, Van't Hoff factor = Number of solute particles = Mg^{2+}+SO_4^{2-} = 1 + 1 = 2

(E) Non-electrolyte

The dissociation non-electrolyte is not possible. So, the Van't Hoff factor will always be, 1.

Hence, the highest van't Hoff factor of solute is, AlCl_3

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