Magnesium hydroxide Mg(OH)₂ is a weak base.
Explanation:
Sulfuric acid H₂SO₄ and hydrochloric acid HCl are, both of them, very strong acids.
Sodium hydroxide NaOH and potassium hydroxide KOH are hydroxides of metals from the first group in the periodic table so thy are strong bases.
As you go to the second group in the periodic table, the hydroxides will not dissociate as much as the hydroxides from the first group in the periodic table , so they will be weak bases. This is the case of magnesium hydroxide Mg(OH)₂.
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acid and bases
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Answer:
T₁ = P₁V₁T₂ / P₂V₂
Explanation:
The combine gas equation is given by:
P₁V₁ / T₁ = P₂V₂ / T₂
Where:
P₁ => is the initial pressure
V₁ => is the initial volume
T₁ => is the initial temperature
P₂ => is the final pressure
V₂ => is the final volume
T₂ => is the final temperature
Finally, we shall make T₁ the subject of the above expression. This can be obtained as follow:
P₁V₁ / T₁ = P₂V₂ / T₂
Cross multiply
T₁P₂V₂ = P₁V₁T₂
Divide both side by P₂V₂
T₁ = P₁V₁T₂ / P₂V₂
Thus, the formula for T₁ is:
T₁ = P₁V₁T₂ / P₂V₂
Ca + 2HCl = CaCl₂ + H₂
m(Ca)=60 g
c=1.25 mol/l
M(Ca)=40g/mol
v-?
m(Ca)/M(Ca)=m(HCl)/[2M(HCl)]=n(HCl)/2
n(HCl)=2m(Ca)/M(Ca)
n(HCl)=cv
cv=2m(Ca)/M(Ca)
v=2m(Ca)/{cM(Ca)}
v=2·60g/mol/{1.25mol/l·40g/mol}=2.4 l = 2400 ml
2400 milliliters of a 1.25 molar HCl solution would be needed
Its would be fluorine as its the most electronegative
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