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4 years ago

Sulphuric acid is a strong acid but acetic acid is weak acid why

Chemistry

1 answer:

Lemur [1.5K]4 years ago

8 0

Answer:

sulphuric is a strong acid

Explanation:

Sulphuric is a strong acid because it completely ionises in water while acetic acid partially ionises in water

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Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy

SVETLANKA909090 [29]

. The energy of shells in a hydrogen atom is calculated by the formula E = -Eo/n^2 where n is any integer, and Eo = 2.179X10^-18 J. So, the energy of a ground state electron in hydrogen is:

E = -2.179X10^-18 J / 1^2 = -2.179X10^-21 kJ

Consequently, to ionize this electron would require the input of 2.179X10^-21 kJ

2. The wavelength of a photon with this energy would be:

Energy = hc/wavelength

wavelength = hc/energy

wavelength = 6.626X10^-34 Js (2.998X10^8 m/s) / 2.179X10^-18 J = 9.116X10^-8 m

Converting to nanometers gives: 91.16 nm

3. Repeat the calculation in 1, but using n=5.

4. Repeat the calculation in 2 using the energy calculated in 3.

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3 years ago

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The acidic ingredient in vinegar is acetic acid. The pH of vinegar is around 2.4, and the molar concentration of acetic acid in

IrinaK [193]

Answer: The value of acid ionization constant $K_a$ for acetic acid is $1.87\times 10^{-5}$

Explanation:

$CH_3COOH\rightarrow H^+CH_3COO^-$

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$c-c\alpha$ $c\alpha$ $c\alpha$

So dissociation constant will be:

$K_a=\frac{(c\alpha)^{2}}{c-c\alpha}$

Give c= 0.85 M and $pH$ = 2.4

$pH=-log[H^+]$

$[H^=}=c\times \alpha=10^{-2.4}=3.98\times 10^{-3}$

$K_a=?$

Putting in the values we get:

$K_a=\frac{(3.98\times 10^{-3})^2}{(0.85-3.98\times 10^{-3})}=1.87\times 10^{-5}$

Thus the value of acid ionization constant $K_a$ for acetic acid is $1.87\times 10^{-5}$

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3 years ago

A 20 ounce bottle of soda provides a total of 300. calories. how many kilojoules are in the soda

Yuri [45]

The ratio which denotes the relation between the two different units is said to conversion factors.

According to conversion factors, the relation between calorie and kilojoule is given as, one Calorie is equal to 4.184 kJ.

1 Cal = 4.184 kJ

Now, according to above relation, convert 300 calories into kilojoules.

300 calories = $300 Cal\times \frac{4.184 kJ}{1 Cal}$

= $1255.2 kJ$

$\simeq 1255 kJ$

Thus, kilojoules present in soda is equal to $1255 kJ$

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Sulphuric acid is a strong acid but acetic acid is weak acid why​

Sulphuric acid is a strong acid but acetic acid is weak acid why