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blagie [28]
2 years ago
15

An aqueous solution of ________ will produce a neutral solution. An aqueous solution of ________ will produce a neutral solution

. NaNO2 Li2CO3 NaF NaClO4 NH4ClO4
Chemistry
1 answer:
IRINA_888 [86]2 years ago
8 0

Answer:

An aqueous solution of  NaF will produce a neutral solution.

Explanation:

In order to classify the solutions, we need to dissociate all the salts and determine the conjugate pairs of base and acids.

NaNO₂ → Na⁺  + NO₂⁻

Na⁺ comes from the NaOH, a strong base, so the Na⁺ is the conjugate weak acid from the strong base. It will not react. This is a basic salt.

The NO₂⁻  is a conjugate strong base, that comes from the weak acid, nitrous acid. This ion can make hydrolisis.

NO₂⁻  +  H₂O  ⇄    HNO₂   +  OH⁻          Kb

We give OH⁻ to medium, so solution is basic.

Li₂CO₃  →  2Li⁺  +  CO₃⁻²

Li⁺ comes from the LiOH, a strong base, so the cathion is the conjugate weak acid from the strong base. It will not react

The CO₃⁻²  is a conjugate strong base, that comes from the weak acid, carbonic acid. This ion can make hydrolisis.

CO₃⁻²  +  H₂O  ⇄    HCO₃⁻  +  OH⁻      Kb

NaClO₄ →  Na⁺  +  ClO₄⁻

Na⁺ comes from the NaOH, a strong base, so the cathion is the conjugate weak acid from the strong base. It will not react

The ClO₄⁻  is a conjugate strong base, that comes from the weak acid, perchloric acid. This ion can make hydrolisis. This is a basic salt.

ClO₄⁻  +  H₂O  ⇄    HClO₄⁻  +  OH⁻      Kb

NH₄ClO₄  →  NH₄⁺  +  ClO₄⁻

Both ions can make hydrolisis. Ammonium comes from a weak base, so it is the strong conjugate base, and  ClO₄⁻  is a conjugate strong base, that comes from the weak acid, perchloric acid

NH₄⁺  +  H₂O  ⇄  NH₃  +  H₃O⁺         Ka

ClO₄⁻  +  H₂O  ⇄    HClO₄⁻  +  OH⁻      Kb

This sort of salt are generally acid.

NaF  →  Na⁺  + F⁻

As we have seen, Na⁺ comes from the NaOH (a strong base) so it will not react.

This equilibrium can not occur: Na⁺  + H₂O ←  NaOH   +  H⁺

F⁻  comes from a strong acid, HF so it will not also react. This reaction can not occur too: F⁻  + H₂O ←  HF   +  OH⁻

We do not have reaction in this neutral salt, so the pH is neutral.

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PLEASE I NEED HELP ASAP!!!!
miv72 [106K]

The percent yield of the calcium hydroxide is 84.5%.

<h3>What is stoichiometry?</h3>

Stoichiometry enables us to obtain the mass of a substance form the equation of the reaction.

The equation of the reaction is;

CaCO3 + 2HCl -----> CaCl2 + CO2 + H2O

Number of moles of X = 40.0 grams/100 g/mol = 0.4 moles

Number of moles of HCl = 850/1000 * 1 M = 0.85 moles

If 1 mole of CaCO3 reacts with 2 moles of HCl

0.4 moles of  CaCO3 reacts with  0.4 moles  * 2 moles/1 mole

= 0.8 moles of HCl

Hence X is the limiting reactant.

The reaction is 1:1 then the amount of CO2  produced is 0.4 moles

Mass of CO2 = 0.4 CO2 * 44 g/mol = 17.6 g

2) The reaction equation is; 2NaOH + CaCO3 --->  Ca(OH)2 + Na2CO3

Number of moles of X = 25.0 grams/100 g/mol =  0.25 moles

Number of moles of NaOH= 40/1000 L * 2 M = 0.08 moles

If 1 mole of X reacts with 2 moles of NaOH

0.25 moles  reacts with   0.25 moles   * 2 moles /1 mole

= 0.5 moles

NaOH is the limiting reactant

2 moles of NaOH produces 1 mole of CO2

0.08 moles of NaOH produces 0.08 moles * 1 mole/2 moles

= 0.04 moles of CO2

Theoretical yield of CO2 =  0.04 moles of CO2 * 74 g/mol = 2.96  g

Percent yield = 2.5 g/ 2.96  g * 100

= 84.5%

Learn ore about percent yield:brainly.com/question/17042787

#SPJ1

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Explanation:

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Explanation:

Answer

Open in answr app

The rule used here is that the algebraic sum of the oxidation numbers of all the atoms a molecule is zero.

Al2O32× ( oxidation number of Al)+3× ( Oxidation number of O )  = 0

2× ( Oxidation number of Al) +3(−2)=0

2× ( oxidation number of Al) +6

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