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Principles of General Chemistry | 2nd Edition | ISBN: 9780073511085 | Authors: Martin S. Silberberg
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Calcium dihydrogen phosphate, Ca(H2PO4)2, and sodium

Chapter 4, Problem 91P

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QUESTION:

Calcium dihydrogen phosphate, \(\mathrm{Ca}\left(\mathrm{H}_{2} \mathrm{PO}_{4}\right)_{2}\), and sodium hydrogen carbonate, \(\mathrm{NaHCO}_{3}\), are ingredients of baking powder that react with each other to produce \(\mathrm{CO}_{2}\), which causes dough or batter to rise:

\(\mathrm{Ca}\left(\mathrm{H}_{2} \mathrm{PO}_{4}\right)_{2}(\mathrm{~s})+\mathrm{NaHCO}_{3}(\mathrm{s}) \rightarrow \mathrm{CO}_{2}(\mathrm{g})+\mathrm{H}_{2} \mathrm{O}(\mathrm{g})+\mathrm{CaHPO}_{4}(\mathrm{~s})+\mathrm{Na}_{2} \mathrm{HPO}_{4}(\mathrm{s})\) [unbalanced]

If the baking powder contains \(31 \% \ \mathrm{NaHCO}_{3}\)and \(35 \% \ \mathrm{Ca}\left(\mathrm{H}_{2} \mathrm{PO}_{4}\right)_{2}\) by mass:

How many moles of \(\mathrm{CO}_{2}\) are produced from \(1.00 g\) of baking powder?

If 1 mol of \(\mathrm{CO}_{2}\) occupies \(37.0 L\) at \(350^{\circ} \mathrm{F}\) (a typical baking temperature), what volume of \(\mathrm{CO}_{2}\)is produced from \(1.00 g\) of baking powder?

Equation Transcription:

Ca(H2PO4)2

NaHCO3

CO2

Ca(H2PO4)2(s) + NaHCO3(s) CO2(g) + H2O(g) + CaHPO4(s) + Na2HPO4(s)

31% NaHCO3

35% Ca(H2PO4)2

CO2

350°F

Text Transcription:

Ca(H_2PO_4)_2

NaHCO_3

CO_2

Ca(H_2PO_4)_2(s) + NaHCO_3(s) rightarrow CO_2(g) + H_2O(g) + CaHPO_4(s) + Na_2HPO_4(s)

31% NaHCO_3

35% Ca(H_2PO_4)_2

1 mol

CO_2

37.0 L

350°F

1.00 g

Questions & Answers

QUESTION:

Calcium dihydrogen phosphate, \(\mathrm{Ca}\left(\mathrm{H}_{2} \mathrm{PO}_{4}\right)_{2}\), and sodium hydrogen carbonate, \(\mathrm{NaHCO}_{3}\), are ingredients of baking powder that react with each other to produce \(\mathrm{CO}_{2}\), which causes dough or batter to rise:

\(\mathrm{Ca}\left(\mathrm{H}_{2} \mathrm{PO}_{4}\right)_{2}(\mathrm{~s})+\mathrm{NaHCO}_{3}(\mathrm{s}) \rightarrow \mathrm{CO}_{2}(\mathrm{g})+\mathrm{H}_{2} \mathrm{O}(\mathrm{g})+\mathrm{CaHPO}_{4}(\mathrm{~s})+\mathrm{Na}_{2} \mathrm{HPO}_{4}(\mathrm{s})\) [unbalanced]

If the baking powder contains \(31 \% \ \mathrm{NaHCO}_{3}\)and \(35 \% \ \mathrm{Ca}\left(\mathrm{H}_{2} \mathrm{PO}_{4}\right)_{2}\) by mass:

How many moles of \(\mathrm{CO}_{2}\) are produced from \(1.00 g\) of baking powder?

If 1 mol of \(\mathrm{CO}_{2}\) occupies \(37.0 L\) at \(350^{\circ} \mathrm{F}\) (a typical baking temperature), what volume of \(\mathrm{CO}_{2}\)is produced from \(1.00 g\) of baking powder?

Equation Transcription:

Ca(H2PO4)2

NaHCO3

CO2

Ca(H2PO4)2(s) + NaHCO3(s) CO2(g) + H2O(g) + CaHPO4(s) + Na2HPO4(s)

31% NaHCO3

35% Ca(H2PO4)2

CO2

350°F

Text Transcription:

Ca(H_2PO_4)_2

NaHCO_3

CO_2

Ca(H_2PO_4)_2(s) + NaHCO_3(s) rightarrow CO_2(g) + H_2O(g) + CaHPO_4(s) + Na_2HPO_4(s)

31% NaHCO_3

35% Ca(H_2PO_4)_2

1 mol

CO_2

37.0 L

350°F

1.00 g

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