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2 years ago

Choose the THREE items that are characteristic of a strong base.

Chemistry

2 answers:

Novay_Z [31]2 years ago

5 0

many OH-ions , large Kband small Ka , large Kaand small Kb , few H+ions

Natali5045456 [20]2 years ago

4 0

Answer:

many OH- ions

few H+ ions

large Kb and small Ka

Explanation:

A strong base has a large concentration of OH-. A typical example of this is NaOH.

Also a strong base usually has a very low concentration of H^+ ions and a very high concentration of OH^- ions.

Lastly, it must have a very high base dissociation constant. Its Kb, the base dissociation constant is a measure of how completely a base dissociates into its component ions in water. The higher the Kb, the stronger the base. A strong base dissociates completely in solution.

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3 years ago

Metamorphism can best be defined as

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3 years ago

Which statement explains why a C–O bond is

Nataly_w [17]

Answer: (3) The difference in electronegativity between carbon and oxygen is greater than that between fluorine and oxygen.

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Electronegativity of carbon = 2.5

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3 years ago

Read 2 more answers

1Explain why the ions of sodium, magnesium and aluminium are smaller than their corresponding atoms.

ella [17]

Answer:

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Hope this helps!

Explanation:

3 0

2 years ago

Which aqueous solution has the highest boiling point at standard pressure?(1) 1.0 M KC1(aq) (3) 2.0 M KCl(aq)(2) 1.0 M CaC12(aq)

miss Akunina [59]

Answer:

(4) 2.0 M CaCl₂(aq).

Explanation:

Adding solute to water elevates the boiling point.

The elevation in boiling point (ΔTb) can be calculated using the relation:

ΔTb = i.Kb.m,

where, ΔTb is the elevation in boiling point.

i is the van 't Hoff factor.

van 't Hoff factor is the ratio between the actual concentration of particles produced when the substance is dissolved and the concentration of a substance as calculated from its mass. For most non-electrolytes dissolved in water, the van 't Hoff factor is essentially 1.

Kb is the molal elevation constant of water.

m is the molality of the solution.

(1) 1.0 M KCl(aq):

i for KCl = no. of particles produced when the substance is dissolved/no. of original particle = 2/1 = 2.

suppose molarity = molality, m = 1.0 m,

∴ ΔTb for (1.0 M KCl) = i.Kb.m = (2)(Kb)(1.0 m) = 2(Kb).

(2) 2.0 M KCl(aq):

i for KCl = no. of particles produced when the substance is dissolved/no. of original particle = 2/1 = 2.

suppose molarity = molality, m = 2.0 m,

∴ ΔTb for (1.0 M KCl) = i.Kb.m = (2)(Kb)(2.0 m) = 4(Kb).

(3) 1.0 M CaCl₂(aq):

i for CaCl₂ = no. of particles produced when the substance is dissolved/no. of original particle = 3/1 = 3.

suppose molarity = molality, m = 1.0 m,

∴ ΔTb for (1.0 M KCl) = i.Kb.m = (3)(Kb)(1.0 m) = 3(Kb).

(4) 2.0 M CaCl₂(aq):

i for CaCl₂ = no. of particles produced when the substance is dissolved/no. of original particle = 3/1 = 3.

suppose molarity = molality, m = 2.0 m,

∴ ΔTb for (1.0 M KCl) = i.Kb.m = (3)(Kb)(2.0 m) = 6(Kb).

So, the aqueous solution has the highest boiling point at standard pressure is: (4) 2.0 M CaCl₂(aq).

6 0

3 years ago