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4 years ago

Which of the following statements about metallic bond are correct?

1 answer:

4 0

2 and 3 are true. Metals are malleable because they don't bond tightly, or they have a "sea" of electrons that allow the atoms to move about freely. The more electrons that are available to bond, the more those atoms are attracted, causing a stronger bond. If you have any questions about this, please let me know!

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Balance the following skeleton reaction and identify the oxidizing and reducing agents: Include the states of all reactants and

coldgirl [10]

Answer :

a. The oxidizing agent is: $BH_4^-$

b. The reducing agent is: $ClO_3^-$

Explanation :

Redox reaction or Oxidation-reduction reaction : It is defined as the reaction in which the oxidation and reduction reaction takes place simultaneously.

Oxidation reaction : It is defined as the reaction in which a substance looses its electrons. In this, oxidation state of an element increases. Or we can say that in oxidation, the loss of electrons takes place.

Reduction reaction : It is defined as the reaction in which a substance gains electrons. In this, oxidation state of an element decreases. Or we can say that in reduction, the gain of electrons takes place.

Reducing agent : It is defined as the agent which helps the other substance to reduce and itself gets oxidized. Thus, it will undergo oxidation reaction.

Oxidizing agent : It is defined as the agent which helps the other substance to oxidize and itself gets reduced. Thus, it will undergo reduction reaction.

The given chemical reaction is,

$BH_4^-(aq)+ClO_3^-(aq)\rightarrow H_2BO_3^-(aq)+Cl^-(aq)$

The oxidation-reduction half reaction will be :

Oxidation : $BH_4^-\rightarrow H_2BO_3^-$

Reduction : $ClO_3^-\rightarrow Cl^-$

Now balance oxygen atom on both side.

Oxidation : $BH_4^-\rightarrow H_2BO_3^-+3H_2O$

Reduction : $ClO_3^-+3H_2O\rightarrow Cl^-$

Now balance hydrogen atom on both side.

Oxidation : $BH_4^-+4OH^-\rightarrow H_2BO_3^-+3H_2O$

Reduction : $ClO_3^-+3H_2O\rightarrow Cl^-+6OH^-$

Now balance the charge.

Oxidation : $BH_4^-+4OH^-\rightarrow H_2BO_3^-+3H_2O+4e^-$

Reduction : $ClO_3^-+3H_2O+6e^-\rightarrow Cl^-+6OH^-$

In order to balance the electrons, we multiply the oxidation reaction by 6 and reduction reaction by 4 and then added both equation, we get the balanced redox reaction.

Oxidation : $6BH_4^-+24OH^-\rightarrow 6H_2BO_3^-+18H_2O+24e^-$

Reduction : $4ClO_3^-+12H_2O+24e^-\rightarrow 4Cl^-+24OH^-$

The balanced chemical equation in acidic medium will be,

$6BH_4^-+4ClO_3^-\rightarrow 6H_2BO_3^-+6H_2O+4Cl^-$

$3BH_4^-+2ClO_3^-\rightarrow 3H_2BO_3^-+3H_2O+2Cl^-$

In the redox reaction, $ClO_3^-$ act as oxidizing agent and $BH_4^-$ act as an reducing agent.

7 0

3 years ago

Isotopes ____________ the atomic mass of an element because they have a ____________ number of neutrons. a. disregard, constant

3241004551 [841]

Is B. The number of the atomic mass can increase or decrease because the number of neutrons is different.

7 0

3 years ago

What type of subatomic particles are found in the cloud?

Novay_Z [31]

Answer:

Electrons are particles that surround the nucleus of an atom like a cloud. As with protons and neutrons, electrons are essential to an atom's structure.

8 0

3 years ago

Consider the reaction below in a closed flask. At 200 o C, the equilibrium constant (Kp) is 2.40 × 103 . 2 NO (g)  N2 (g) + O2

olga55 [171]

Explanation:

Since, the given reaction is as follows.

$2NO(g) \rightleftharpoons N_{2}(g) + O_{2}(g)$

Initial: 36.1 atm 0 0

Change: 2x x x

Equilibrium: (36.1 - 2x) x x

Now, expression for $K_{p}$ of this reaction is as follows.

$K_{p} = \frac{[N_{2}][O_{2}]}{[NO]^{2}}$

As the initial pressure of NO is 36.1 atm. Hence, partial pressure of $O_{2}$ at equilibrium will be calculated as follows.

$K_{p} = \frac{[N_{2}][O_{2}]}{[NO]^{2}}$

$2.40 \times 10^{3} = \frac{x \times x}{(36.1 - 2x)^{2}}$

x = 18.1 atm

Thus, we can conclude that partial pressure of $O_{2}$ at equilibrium is 18.1 atm.

5 0

3 years ago

Read 2 more answers

Difference between electrovalent and covalent bonding

Pie

Answer:

A covalent bond is a result of sharing electrons between two atoms. The main difference between electrovalent and covalent bond is that electrovalent bond is formed when two atoms are in an electrostatic attraction whereas covalent bond is formed when two atoms share their electrons with each other.

6 0

4 years ago