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3 years ago

What does the symbol ka mean in chemistry?

Chemistry

2 answers:

Dmitry_Shevchenko [17]3 years ago

4 0

Ka is an equilibrium constant for the partial ionization of "weak" acids in water.

goblinko [34]3 years ago

3 0

Ka is an equilibrium constant for the partial ionization of "weak" acids in water. If such a weak acid is HOAc, the ionization is
HOAc = H+ + OAc- 
and Ka= [H+][OAc-]/[HOAc] 

Ka values range from about 10-2 to 10-14 Greater than 10-2, they are essentially strong acids, and below 10-14, they produce no more [H+] in water than would normally be observed.

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Ammonium sulfate, an important chemical fertilizer, can be prepared by the reaction of ammonia with sulfuric acid according to t

sweet-ann [11.9K]

Answer:

147 grams

Explanation:

We are given:

Pressure (P) = 22.7 atm

Temperature (T) = 304.5 K

Volume (V) = 3.29 L

Solving for the number of moles of Ammonia:

From the Ideal Gas Equation:

PV = nRT

replacing the variables

(22.7)(3.29) = n (0.082)(304.5) [R = 0.082 L atm / mol K]

n = 3 moles (approx)

Number of moles of Sulphuric Acid required:

We are given the balanced equation:

2 NH3(g) + H2SO4(aq) → (NH4)2SO4(aq)

we can see that for 2 moles of Ammonia, we will need 1 mole of Sulphuric acid

So, we can say that we need half the number of moles of sulphuric acid as compared to Ammonia

Hence, We will need half the number of moles of Ammonia

Number of moles of Sulphuric acid required = 1/2 * Moles of Ammonia

Moles of Sulphuric Acid = 1/2 * 3

Moles of Sulphuric acid = 3/2 moles

Mass of Sulphuric Acid needed:

We know that the molar mass of Sulphuric acid is 98 grams/mol

We know that the mass of a given number of moles of a compound is the number of moles multiplied by the molar mass

Mass of Sulphuric Acid = Number of moles * Molar mass

Mass of Sulphuric Acid = 1.5 * 98

Mass of Sulphuric Acid = 147 grams

3 0

3 years ago

PLEASE HELP! ITS INTEGRATED SCIENCE

Lady bird [3.3K]

Answer:

-4

16:00

it's pretty accurate besides it's way of numbering.

7 0

3 years ago

Read 2 more answers

Identify the charges = Mg2+ F1

gladu [14]

Answer:

its called drop and swap

Explanation:

4 0

3 years ago

What is the pressure inside a 2.0 L bottle filled with 0.25 mol of carbon dioxide gas at 25 °C?

motikmotik

Answer:

3.1atm

Explanation:

Given parameters:

Volume of gas = 2L

Number of moles = 0.25mol

Temperature = 25°C = 25 + 273 = 298K

Unknown:

Pressure of the gas = ?

Solution:

To solve this problem, we use the ideal gas equation.

This is given as;

PV = nRT

P is the pressure

V is the volume

n is the number of moles

R is the gas constant = 0.082atmdm³mol⁻¹K⁻¹

T is the temperature

P = $\frac{nRT}{V}$

Now insert the parameters and solve;

P = $\frac{0.25 x 0.082 x 298}{2}$ = 3.1atm

8 0

3 years ago

Write a balanced equation for rusting. (Assume rust becomes Fe+2)

Stells [14]

Answer:

4Fe + 3O2 + 6H2O → 4Fe(OH)3

Explanation:

The chemical formula for rust is Fe2O3 and is commonly known as ferric oxide or iron oxide. The final product is a series of chemical reactions simplified below as- The rusting of the iron formula is simply 4Fe + 3O2 + 6H2O → 4Fe(OH)3. The rusting process requires both the elements of oxygen and water.

8 0

2 years ago