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3 years ago

Write a net ionic equation to show that triethylamine, (C2H5)3N, behaves as a Bronsted-Lowry base in water.

Chemistry

1 answer:

mixas84 [53]3 years ago

6 0

Answer:

$(C_2H_5)_3N~+~H_2O~->~(C_2H_5)_3NH^+~+~OH^-$

Explanation:

For this question, we have to remember that definition of acid and base in the Bronsted-Lowry theory:

Acid

A substance with the ability to produce a hydronium ion ( $H^+$ ).

$HA~->~H^+~+~A^-$

Base

A substance with the ability to accepts a hydronium ion ( $H^+$ ).

$B~+~H^+->BH^+$

If we check the reaction mechanism (figure 1). We can see that the lone pair of electrons in the "N" atom will remove an "H" from the water molecule producing a positive charge in the nitrogen and a hydroxyl group ( $OH^-$ ).

With all this in mind, the net ionic equation would be:

$(C_2H_5)_3N~+~H_2O~->~(C_2H_5)_3NH^+~+~OH^-$

I hope it helps!

You might be interested in

calculate the number of grams of CH3COONa * 3H2O (sodium acetate tri-hydrate) needed to make 250.0 mL of a CH3COOH (acetic acid)

anastassius [24]

Answer:

10.88 g

Explanation:

We have:

[CH₃COOH] = 0.10 M

pH = 5.25

Ka = 1.80x10⁻⁵

V = 250.0 mL = 0.250 L

$M_{CH_{3}COONa*3H_{2}O} = molar \thinspace mass = 136 g/mol$

The pH of the buffer solution is:

$pH = pKa + log(\frac{[CH_{3}COONa*3H_{2}O]}{[CH_{3}COOH]})$ (1)

By solving equation (1) for [CH₃COONa*3H₂O] we have:

$log [CH_{3}COONa*3H_{2}O] = pH - pKa + log [CH_{3}COOH]$

$log [CH_{3}COONa*3H_{2}O] = 5.25 - (-log(1.80 \cdot 10^{-5})) + log (0.10) = -0.495$

$[CH_{3}COONa*3H_{2}O] = 10^{-0.495} = 0.32 M$

Hence, the mass of the sodium acetate tri-hydrate is:

$m = moles*M = [CH_{3}COONa*3H_{2}O]*V*M = 0.32 mol/L*0.250 L*136 g/mol = 10.88 g$

Therefore, the number of grams of CH₃COONa*3H₂O needed to make an acetic acid/sodium acetate tri-hydrate buffer solution is 10.88 g.

I hope it helps you!

4 0

3 years ago

Why don’t the common ions in humans (na+, k+, cl-, etc.) cluster together in cells?

mariarad [96]

The answer is because like electric charges do not attract with each other. Ions either lack or have excess electrons in their atomic structure. Ions with a positive charge are called cations. They lack electrons in their atoms so they have to pair up with negatively charged ions, called anions, because they have excess electrons. Together, they form a compound that is neutral.

7 0

3 years ago

The student's lab manual says to mix some of his Na2CO3 solution with an aqueous solution of copper(II) sulfate (CuSO4)

lord [1]

Explanation:

When the student mixed the solution sodium carbonate with solution of copper(II) sulfate ; Copper Hydroxocarbonate , sodium sulfate and carbon dioxide gas was obtained as a products.

The balanced chemical reaction

$2Na_2CO_3+2CuSO_4\rightarrow Cu_2(OH)_2CO_3+2Na_2SO_4+CO_2$