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3 years ago

At 20 degrees celsius, how much sodium chloride could be dissolved in 2L of water

1 answer:

8 0

The source below says 35.89g of NaCl dissolve in 100 g of water at 20 °C.

(35.89g / 100 mL) x (2000 mL) = 718 g

Hope this helped

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Write an expression for the equilibrium constant of each chemical equation: a. SbCl5(g)SbCl5(g) + Cl2(g) b. 2 BrNO(g)2 NO(g) + B

denis-greek [22]

Answer:

See explanation

Explanation:

Step 1: Data given

For the reaction aA + bB ⇆ cC + dD

Kc = [C]^c * [D]^d / [A]^a [B]^b

a. SbCl5(g) ⇄ SbCl3(g) + Cl2(g)

Kc = [Cl2]*[SbCl3] / [SbCl5]

b. 2 BrNO(g) ⇄ 2NO(g) + Br2(g)

Kc = [Br2]*[NO]² / [BrNO]²

c. CH4(g) + 2 H2S(g) ⇄ CS2(g) + 4 H2(g)

Kc = [H2]^41 * [CS2] / [H2S]²*[CH4]

d. 2CO(g) + O2(g) ⇄ 2CO2(g)

Kc = [CO2]² / [O2][CO]²

6 0

4 years ago

Jimmy developed a model to show the difference between pure substances and mixtures

IrinaK [193]

Pure substances cannot be separated into any other kinds of matter, while a mixture is a combination of two or more pure substances.
A pure substance has constant physical and chemical properties, while mixtures have varying physical and chemical properties.

Explanation:

A matter which cannot be separated into any other kind of matter using the chemical or physical process is called pure substances. A pure substance has the same color, composition, and texture.
An element consisting of a single compound with a definite composition, physical and chemical properties are called pure substances.
A combination that has as of many substances that are not united using a chemical procedure or any process is known as mixtures. A mixture does not exist in fixed proportions, and most of the natural substances are mixtures.

8 0

3 years ago

The extent of ionization of a weak electrolyte is increased by adding to the solution a strong electrolyte that has an ion in co

rjkz [21]

Answer:

The statement is FALSE.

Explanation:

It is known as the ion effect common to the displacement of an ionic equilibrium when the concentration of one of the ions that are involved in said equilibrium changes, due to the presence in the dissolution of a salt that is dissolved in it.

Given the reaction of the dissociation reaction of a weak electrolyte:

AB (s) ⇔ A⁺(aq) + B⁻ (aq)

The equilibrium constant of the reaction is:

$K_{ps}=\frac{[A^+][B^-]}{[AB]}$

Given the reaction of the dissociation reaction of a stong electrolyte:

CB (s) ⇒ C⁺(aq) + B⁻ (aq)

If the electrolyte CB is added to the medium in which electrolyte AB is found, the medium will have a common ion B⁻:

AB (s) ⇔ A⁺(aq) + B⁻ (aq)

CB (s) ⇒ C⁺(aq) + B⁻ (aq)

By the Le Chatelier's principle, having more concentration of products, the balance will shift to the right.

Hence, the extent of ionization of a weak electrolyte is decreased by adding to the solution a strong electrolyte that has an ion in common with the weak electrolyte.

4 0

3 years ago

In a constant‑pressure calorimeter, 70.0 mL of 0.350 M Ba(OH)2 was added to 70.0 mL of 0.700 M HCl. The reaction caused the temp

DanielleElmas [232]

Answer: The amount of heat absorbed by the solution is 2.795 kJ

Explanation:

To calculate the mass of water, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$