Chemistry, 18.02.2020 01:59 selenaK9514

Some of the following salts are used in detergents and other cleaning materials because they produce basic solutions. Which of the following could not be used for this purpose? Write equations to justify your answers.

a. Sodium carbonate
b. Sodium sulfate
c. Ammonium sulfate
d. Sodium phosphate

Answers: 2

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Answer from: cogger9348

Sodium sulfate and Ammonium sulfate could not be used for this purpose.

Explanation:

An acidic solution will show a pH in the range of 0 - 6.9. A basic solution show a pH in the range of 7.1 - 14. A neutral solution will show a pH of 7.

A salt is acidic, when it is formed from the combination of strong acid and weak base. A salt is basic, when it is formed from the combination of weak acid and strong base. A salt is neutral, when it is formed from the combination of weak acid and weak base or strong acid and strong base.

a. Sodium carbonate : is formed by the combination of strong base NaOH and a weak acid H_2CO_3[ , thus forms a basic solution.

$Na_2CO_3\rightarrow 2Na^++CO_3^{2-}$

b. Sodium sulfate: is formed by the combination of strong base NaOH and a strong acid H_2SO_4[ , thus forms a neutral solution.

$Na_2SO_4\rightarrow 2Na^++SO_4^{2-}$

c. Ammonium sulfate: is formed by the combination of weak base NH_4OH and a strong acid H_2SO_4[ , thus forms a acidic solution.

$(NH_4)_2SO_4\rightarrow 2NH_4^++SO_4^{2-}$

d. Sodium phosphate: is formed by the combination of strong base NaOH and a weak acid H_3PO_4[ , thus forms a basic solution.

$Na_3PO_4\rightarrow 3Na^++PO_4^{3-}$

Answer from: Quest

convalent bond :

is a chemical bond formed by the sharing of electron between 2 atoms.

it is the direct chemical bond between 2 atoms.

in bond formation atoms are involved here.

electrovalent bond:

is a chemical bond defined as electroststic attraction between 2 atoms.

it is the electrostatic attraction between 2 atoms.

in bond formation, ions are involved here.

hope it

and ur welcm

: )

Answer from: Quest

Answer : option c) heat is released during the process.explanation :

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.

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