Which compound in each pair is more soluble in water?(a) Magnesium hydroxide or nickel(II) hydroxide

Chemistry

1 answer:

Alexxandr [17]2 years ago

6 0

What is called compound?

In chemistry, a compound is a substance made up of two or more different chemical elements combined in a fixed ratio.
When the elements come together, they react with each other and form chemical bonds that are difficult to break.
These bonds form as a result of sharing or exchanging electrons between atoms.

a) Mg(OH)2 or Ni(OH)2.

Mg(OH)2 1.8×10–11

Ni(OH)2 2.0×10–15

Clearly, Ksp value for Mg(OH)2 is higher , meaning it is MUCH MORE SOLBULE than Nickel

therefore, choose Mg(OH)2.

PbS 3×10–28

CuS 6×10–37

Clearly, PbS is much more soluble than CuS

since Ksp is higher .

Ag2SO4 1.4×10–5

MgF2 3.7×10–8

Clearly, Ag2SO4 has higher Ksp, so it is much more soluble.

Learn more about compound

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The normal boiling point of methanol is 64.7∘c and the molar enthalpy of vaporization of 71.8kj/mol. the value of δs when 1.11 m

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The answer is 236.5 J/K

According to Δ G formula:

ΔG = ΔH - TΔS

when ΔG is the change in free energy (KJ)

and ΔH is the change in enthalpy (KJ)= ΔHvap * moles

= 71.8 KJ/mol * 1.11 mol

= 79.7 KJ

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Δ S is the change in entropy KJ/K

by substitution:

when at equilibrium ΔG = 0

∴ΔS = ΔH / T

=79.7 KJ/ 337 K

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Based on its location on the periodic table, which element would be most likely to form a negative ion?

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3 years ago

Read 2 more answers

1. Which of the following is a correctly written thermochemical equation?

WITCHER [35]

Explanation:

1. Thermochemical equation is balance stoichiometric chemical equation written with the phases of the reactants and products in the brackets along with the enthalpy change of the reaction.

The given correct thermochemical reactions are:

$Fe(s)+O_2(g)\rightarrow Fe_2O_3(s),\Delta H = 3,926 kJ
$

$C_3H_8(g)+5O_2 (g)\rightarrow 3CO_2 (g)+4H_2O(l),\Delta H= 2,220 kJ/mol$

2. Phase change affect the value of the enthalpy change of the thermochemical equation. This is because change in phase is accompanied by change in energy. For example:

$H_2O(s)\rightarrow H_2O(g),\Delta H_{s}=51.1 kJ/mol$