Question

Magnesium hydroxide (Mg(OH)2), as "Milk of Magnesia" can be used to neutralize excess stomach acid, represented by HCl(aq):
Mg(OH)2(s) + 2HCl(aq)  MgCl2(aq) + 2H2O(l)
When 5.00 g of HCl are combined with an excess of Mg(OH)2, what mass of MgCl2 can be produced?

Answer 1

Answer :-

3.973 grams of MgCl₂ can be produced .

Explanation :-

The given balanced equation between Milk of Magnesia and Hydrochloric acid is :-

Mg(OH)₂ (s) + 2HCl (aq) → MgCl₂ (aq) + 2H₂O (l)

In the question, it is given that 5 grams of HCl is combined with excess of Mg(OH)₂ .

As HCl is not present in excess, so it is the limiting reagent and will control the amount of product .

Moles of HCl :-

= Given Mass/Molar mass

= 5/36.5

= 0.137 moles

________________________________

Now using the balanced equation, we have :-

∵ 2 moles of HCl → 1 mole of MgCl₂

∴ 0.137 mole of HCl → 0.0685 mole of MgCl₂

Mass of MgCl₂ formed :-

= Number of moles × Molar mass

= 0.0685 × 58

= 3.973 g

Answer 2

Answer:

$\bigstar\:{\underline{\frak{Given :-}}}$

• When 5.00 g of HCl are combîned with an excéss of Mg(OH)₂.

$\bigstar\:{\underline{\frak{Find\: Out :-}}}$

• What mass of MgCl₂ can be produced?

$\bigstar\:{\underline{\frak{Solution :-}}}$

Magnesium hydroxide Mg(OH)₂, as "Milk of Magnesia" can be used to neutralize excess stomach acid, represented by HCl(aq) :

$\bullet\:{\underline{\bf{Mg(OH)_2(s) + 2HCl\: (aq) \rightarrow\: MgCl_2\:(aq) + 2H_2O(l)}}}$

☣ Moles of HCl :-

We have :

• Mass = 5.00 g
• Molar Mass = 36.5 g/mol

➙ $\red{ \boxed{\sf{Moles =\: \dfrac{Given\: Mass}{Molar\: Mass}}}}$

➙ Mole = $\sf \dfrac{5.00}{36.5}$

➙ ${\small{\bold{\purple{\underline{Mole =\: 0.137\: Moles}}}}}$

☣ Mass of MgCl₂ can be produced :-

We have :

• Number of Moles = 0.0685 Mole
• Mass = 58 g/mol

$\red{ \boxed{\sf{Mass =\: Number\: of\: Moles \times Molar\: Mass}}}$

➔ $\sf Mass =\: 0.0685 \times 58$

➔ ${\small{\bold{\green{\underline{Mass =\: 3.973\: g}}}}}$

Henceforth, the mass of MgCl₂ can be produced is 3.973 g.

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$\qquad\qquad\underline{\textsf{\textbf{ \color{magenta}{Brainly\: Extra\: Shots :-} }}}$

Magnesium hydroxide :-

• Magnesium hydroxide is the inorganic compound with the chemical formula Mg(OH)₂.
• It occurs in nature as the mineral brucite. It is a white solid with low solubility in water.

Molar Mass :

• Molar mass is the mass of a given substance divided by the amount of that substance, measured in g/mol.
• The units of molar mass are grams per mole, abbreviated as g/mol.

Hope It Helps You :)