Lesson_3_-_Example_Solutions_-2009

Lesson_3_-_Example_Solutions_-2009 - Lesson 3 Example 3-1...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Lesson 3 Example 3-1 Baking soda (NaHCO 3 ) is often used as an antacid. It neutralizes excess hydrochloric acid secreted by the stomach: NaHCO 3 ( s ) + HCl ( aq ) → NaCl( aq ) + H 2 O ( l ) + CO 2 ( aq ) Milk of magnesia, which is an aqueous suspension of magnesium hydroxide, is also used as an antiacid: Mg(OH) 2 ( s ) + 2HCl( aq ) → 2 H 2 O ( l ) + MgCl 2 ( aq ) Which is the most effective antacid per gram, NaHCO 3 or Mg(OH) 2 ? Basis: 1.0 g of NaHCO 3 or 1.0 g of Mg(OH) 2 Data: M NaHCO3 = 84 g/mol M Mg(OH)2 = 58 g/mol 3 2 3 NaHCO 3 NaHCO 3 NaHCO NaHCO mol 10 19 . 1 g/mol 84 g 0 . 1 M m n - × = = = HCl mol 10 19 . 1 NaHCO mol 1 HCl mol 1 NaHCO mol 10 19 . 1 n 2 3 3 2 HCl - - × = × × = 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 2 2 ) OH ( Mg 2 ) OH ( Mg 2 ) OH ( Mg Mg(OH) mol 10 72 . 1 g/mol 58 g 0 . 1 M m n - × = = = HCl mol 10 45 . 3 Mg(OH) mol 1 HCl mol 2 Mg(OH) mol 10 72 . 1 n 2 2 2 2 HCl - - × = × × = Therefore, Mg(OH) 2 is a better antacid than NaHCO 3 . 2
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/23/2010 for the course CHEM 103 taught by Professor Chem during the Fall '09 term at University of West Georgia.

Page1 / 12

Lesson_3_-_Example_Solutions_-2009 - Lesson 3 Example 3-1...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online