Ch.3 - Chemical ReactionsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Toilet bowl cleaners often contain hydrochloric acid to dissolve the calcium carbonate deposits that accumulate within a toilet bowl.What mass of calcium carbonate (in grams) can be dissolved by 3.9 g

Solution: Toilet bowl cleaners often contain hydrochloric acid to dissolve the calcium carbonate deposits that accumulate within a toilet bowl.What mass of calcium carbonate (in grams) can be dissolved by 3.9 g

Problem

Toilet bowl cleaners often contain hydrochloric acid to dissolve the calcium carbonate deposits that accumulate within a toilet bowl.

What mass of calcium carbonate (in grams) can be dissolved by 3.9 g of HCl? (Hint: Begin by writing a balanced equation for the reaction between hydrochloric acid and calcium carbonate.)

Solution
  • First thing is to setup the balanced reaction and then use stoichiometry to get the mass of CaCO3). We need the molar masses of HCl and CaCOin this matter.
  • Reaction appears to be a double displacement reaction where counterions are being switched
  • HCl (hydrochloric acid) and CaCO3 (calcium carbonate) dissociates as H+, Cl-, Ca2+ and CO32-
  • Products will appear as H2CO3 (from Hand CO32-) and CaCl2 (from Ca2+ and Cl-)
  • H2CO3 will spontaneously transform to H2O (l) + CO(g) 
  • CaCl2 will appear as aqueous species acc. to the solubility rules. All chlorides (Cl- ) are soluble except AgCl, Hg2Cl2 , and PbClwhich are insoluble.
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