Q4.57P A mixture of bases can sometimes... [FREE SOLUTION]

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Chapter 4: Q4.57P (page 180)

A mixture of bases can sometimes be the active ingredient in antacid tablets. If 0.4826 g of a mixture of ${Al(OH)}_{3}$ and $Mg {(OH)}_{2}$ is neutralized with 17.30 mL of 1.000 M ${HNO}_{3},$ what is the mass % of ${Al(OH)}_{3}$ in the mixture?

Short Answer

Expert verified

The mass % of $Al {(OH)}_{3}$ in the mixture is 55.93%

Step by step solution

Write down the molecular equation

Balanced molecular equation:

$Al {(OH)}_{3} + Mg {(OH)}_{2} (s) + 5 {HNO}_{3} 鈫� Al {({NO}_{3})}_{3} + Mg {({NO}_{3})}_{2} + 5 H_{2} O (l)$

Calculate the mass of Al(OH)3

$\begin{matrix} {苍耻尘产别谤鈥塷蹿鈥尘辞濒别蝉鈥塷蹿鈥塇狈翱}_{3} = 1 鈥尘辞濒/濒脳17.3尘濒脳 \frac{1l}{1000ml} \\ =0.0173mole \end{matrix}$

$尘辞濒别鈥夆赌塺补迟颈辞鈥�=鈥� \frac{1 鈥夆赌尘辞濒别础濒 {(OH)}_{3}}{5 {鈥尘辞濒别蝉贬狈翱}_{3}} = \frac{1}{5}$

Number of moles of $Al {(OH)}_{3}$ that reacted with $0.0173 鈥尘辞濒别蝉$ of ${HNO}_{3}$ is calculated below.

$\begin{matrix} Number鈥塷f鈥尘辞濒别蝉of鈥堿l {(OH)}_{3} = 0.0173 脳 \frac{1}{5} \\ = 0.00346 \end{matrix}$

$\begin{matrix} Mass 鈥夆赌� of 鈥� 1 鈥� mole 鈥� Al {(OH)}_{3} = 78.01 g \\ Mass 鈥夆赌� of 鈥夆赌� 0.00346 鈥� mole 鈥夆赌� Al {(OH)}_{3} = 78.01 g 脳 0.00346 \\ = 0.2699 g \end{matrix}$

Determine the mass % of Al(OH)3

The mass percent of ${Al(OH)}_{3} :$

$\begin{matrix} mass % of Al {(OH)}_{3} & = & \frac{mass of Al {(OH)}_{3}}{total mass of mixture of Al {(OH)}_{3} and Mg {(OH)}_{2}} 脳 100 % \\ = & \frac{0.2699 gmAl {(OH)}_{3}}{0.4826 gm} x 100 % \\ = & 55.93 % \end{matrix}$

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91影视

A mixture of bases can sometimes be the active ingredient in antacid tablets. If 0.4826 g of a mixture of ${Al(OH)}_{3}$ and $Mg {(OH)}_{2}$ is neutralized with 17.30 mL of 1.000 M ${HNO}_{3},$ what is the mass % of ${Al(OH)}_{3}$ in the mixture?

Short Answer

Step by step solution

Write down the molecular equation

Calculate the mass of Al(OH)3

Determine the mass % of Al(OH)3

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91影视

A mixture of bases can sometimes be the active ingredient in antacid tablets. If 0.4826 g of a mixture of Al(OH)3and Mg(OH)2is neutralized with 17.30 mL of 1.000 M HNO3,what is the mass % ofAl(OH)3in the mixture?

Short Answer

Step by step solution

Write down the molecular equation

Calculate the mass of Al(OH)3

Determine the mass % of Al(OH)3

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Chemistry Textbooks

The Earths Atmosphere

Chemistry Branches

Nuclear Chemistry

Chemical Reactions

Ionic and Molecular Compounds

Physical Chemistry

Study anywhere. Anytime. Across all devices.

A mixture of bases can sometimes be the active ingredient in antacid tablets. If 0.4826 g of a mixture of ${Al(OH)}_{3}$ and $Mg {(OH)}_{2}$ is neutralized with 17.30 mL of 1.000 M ${HNO}_{3},$ what is the mass % of ${Al(OH)}_{3}$ in the mixture?