What is the pH of .038 M HCI?

Which of the following species has

Kisachek [45]

Answer:

see explanation...

Explanation:

Mg⁺²-24 Co⁺³-60 Clˉ-35

Protons (p⁺) 12 27 17

Neutrons (n⁰) 12 33 18

Electrons (eˉ) 10 24 18

(c) (b) (a)

12/2 : 12/2 : 10/2 27/3 : 33/3 : 24/3 #n⁰ = 18

6 : 6 : 5 9 : 11 : 8 #eˉ = 18

7 0

3 years ago

Under standard-state conditions, which of the following species is the best reducing agent? a. Ag+ b. Pb c. H2 d. Ag e. Mg2+

eimsori [14]

Answer: The correct answer is Option b.

Explanation:

Reducing agents are defined as the agents which help the other substance to get reduced and itself gets oxidized. They undergo oxidation reaction.

$X\rightarrow X^{n+}+ne^-$

For determination of reducing agents, we will look at the oxidation potentials of the substance. Oxidation potentials can be determined by reversing the standard reduction potentials.

For the given options:

Option a: $Ag^+$

This ion cannot be further oxidized because +1 is the most stable oxidation state of silver.

Option b: $Pb$

This metal can easily get oxidized to $Pb^{2+}$ ion and the standard oxidation potential for this is 0.13 V

$Pb\rightarrow Pb^{2+}+2e^-;E^o_{(Pb/Pb^{2+})}=+0.13V$

Option c: $H_2$

This metal can easily get oxidized to $H^{+}$ ion and the standard oxidation potential for this is 0.0 V

$H_2\rightarrow 2H^++2e^-;E^o_{(H_2/H^{+})}=0.0V$

Option d: $Ag$

This metal can easily get oxidized to $Ag^{+}$ ion and the standard oxidation potential for this is -0.80 V

$Ag\rightarrow Ag^{+}+e^-;E^o_{(Ag/Ag^{+})}=-0.80V$

Option e: $Mg^{2+}$

This ion cannot be further oxidized because +2 is the most stable oxidation state of magnesium.

By looking at the standard oxidation potential of the substances, the substance having highest positive $E^o$ potential will always get oxidized and will undergo oxidation reaction. Thus, considered as strong reducing agent.

From the above values, the correct answer is Option b.

8 0

3 years ago

Which kind of climate do the most stable ecosystems tend to have?

Ganezh [65]

B because the climate has to be pretty balanced and if it’s too cold it won’t be habitable and if the climate is too hot it won’t be habitable aswell

6 0

3 years ago

Which of the pollowing is

34kurt

Answer:

At transform plate boundaries, two plates move in opposite direction. Transform faults are the site of massive earthquakes. The San Andreas Fault is the boundary between the Pacific and North American plates.

6 0

2 years ago

The rate of heat transfer by radiation is best described by which statement?

bogdanovich [222]

requires a medium to propagate

Explanation:

due to radiation z a dispersion of light ray into different multiple

7 0

3 years ago