Chemistry, 28.02.2021 01:10 noahdeno200010125

IM IN A TEST PLS HELP A solution of the acid contains hydrogen ions. Write an ionic equation for the reaction of sodium with the hydrogen ions in the acid. Include state symbols in your answer.

Answers: 3

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The thing to recognize here is the fact that you're dealing with a neutralization reaction that features sodium hydroxide,

NaOH

, a strong base, and hydrochloric acid,

HCl

, a strong acid.

This tells you that the two reactants will dissociate completely in aqueous solution to produce cations and anions. More specifically, you will have

NaOH

(

)

→

(

)

−

(

)

HCl

(

)

→

(

)

−

(

)

Now, when these two solutions are mixed, the hydroxide anions produced by the strong base and the hydrogen ions produced by the strong acid will neutralize each other to produce water.

The sodium cations and the chloride anions act as spectator ions because they are present on both sides of the chemical equation as ions.

You can tell that this is the case because sodium chloride,

NaCl

, one of the two products of the reaction, is soluble in aqueous solution.

So, the complete ionic equation will be

(

)

−

(

)

(

)

−

(

)

→

(

)

−

(

)

(

)

To get the net ionic equation, simply remove the spectator ions

(

)

−

(

)

(

)

−

(

)

→

(

)

−

(

)

(

)

You will end up with

(

)

−

(

)

→

(

)

SIDE NOTE You will sometimes see the hydrogen ion being replaced by the hydronium ion,

In this case, the dissociation of hydrochloric acid is represented by the chemical equation

HCl

(

)

(

)

→

(

)

−

(

)

The net ionic equation will now take the form

(

)

−

(

)

→

(

)

Answer from: Quest

assuming that your periodic table has eighteen columns, you should highlight the four elements in the third column from the left of the table.

explanation

neutral atoms of elements after calcium contain d electrons. the energy of d orbitals of a particular main shell lies between the energy of the s and p orbitals of the next main shell. for example, electrons in the $3d$ have energy higher than those in the $4 s$ orbital while lower than those of the $4 p$ orbital.

by the aufbau principle, electrons fill orbitals one at a time, starting from those of the lowest energy. the $4s$ orbital is therefore filled right after $3p$ orbitals and before $3 d$ orbitals.

potassium has electron configuration $[\text{ar}] 4 s^{1}$ and calcium $[\text{ar}] 4 s^{2}$ . the s orbital of a main shell holds a maximum of two electrons. the next element would thus have the electron configuration $[\text{ar}] 4 s^{2} \; 3d^{1}$ and satisfy the requirements.

a neutral atom of the element contains three electrons on top of the most recent noble gas element. it should thus be placed in the third column of the periodic table. both scandium and yttrium would satisfy the conditions. an aufbau diagram indicates that the 4f orbital is filled before the 5d. however, it appears that exceptions exists for both lanthanum and actinium. neutral atoms of the two d-block elements also demonstrate the $ns^{2} \; (n-1) p^{1}$ and should be highlighted as well.

Answer from: Quest

Ithink 2 is the correct

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IM IN A TEST PLS HELP A solution of the acid contains hydrogen ions. Write an ionic equation for th...

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