Molarity equation - Study guides, Class notes & Summaries

CHEM 209: QUIZ 1 with Complete and Verified Answers 1. What is a "back titration"? Answer: It's a technique where the concentration of an analyte is determined by reacting it with an excess of a known reagent. 2. What is the balanced chemical equation for the complete reaction between CO32− and HCl? Answer: CO32−(aq) + 2H+(aq) → H2O(l) + CO2(g) 3. What is the balanced chemical equation for the complete reaction between KHP (KHC8H4O4) and NaOH? Answer: KHC8H4O4(aq...

Chem Exam 3 Things to Know 100% Verified Review Solution 2024/2025 Before starting a titration equation, what do we need to find? - ANS-Ka/Kb (given the other), volume, concentration of acid and base, initial mols of weak acid/base at the starting point of a titration, how do you find pH? - ANS-use a RICE table to find K expression equation, plug initial (not titrant) concentration into table and when you have K expression, solve for X. take -log of x for pH at the buffer region of a ti...

CHEM 209 Quiz 1 Latest Update Graded A+ Question: What is a back titration? - a. A method where excess titrant is added first and then the remaining is titrated - b. A titration where the initial solution is known and the excess is titrated carefully - c. A technique involving titration with a known excess of titrant, followed by titration of the excess - Answer: c. A technique involving titration with a known excess of titrant, followed by titration of the excess Explanation...

Molarity (M) - mols solute / L of solution Molality (m) - mols solute / kg solvent Freezing point depression / boiling point elevation deltaT(b) or deltaT(f) - deltaT(b or f) = i*K(b or f)*m i = Van't Hoff factor Kb or Kf = constant m = molality of solute Osmotic pressure (pi) - pi = i*M*R*T i = Van't Hoff factor M = molarity R = gas law constant 0.08206 L*atm/K*mol T = temperature (K) Van't Hoff factor (i) - i = mols of particles in solution / mols of solute dissolves applies fo...

Solution - homogenous mixture of 2 or more substances Solute - What is being dissolved Solvent - What is doing the dissolving Saturated - The solution is at the maximum amount of solute Supersaturated - There is more solute dissolved than usually allowed because of a change in the pressure or temperature during dissolution Unsaturated - The solution does not have the maximum amount of solute for its volume of solvent ppm (parts per million) - grams of solute/ grams of solution ...

Chem Exam 3 Things to Know 100% Verified Review Solution 2024/2025 Before starting a titration equation, what do we need to find? - ANS-Ka/Kb (given the other), volume, concentration of acid and base, initial mols of weak acid/base at the starting point of a titration, how do you find pH? - ANS-use a RICE table to find K expression equation, plug initial (not titrant) concentration into table and when you have K expression, solve for X. take -log of x for pH at the buffer region of a ti...

Chapter 3—Chemical Equations and Reaction Stoichiometry MULTIPLE CHOICE 1. Which of the following is not a consequence of the Law of Conservation of Matter? a. It provides a basis for balancing chemical equations. b. It means that there will be no observable change in the quantity of matter during a chemical reaction. c. As a result, there will be the same number of moles on both the reactant and the product side of a balanced equation. d. It can be stated as "matter is neither creat...

Matter Most basic building block. Must have mass and volume Elements Simplest form of matter, can't decompose any further Molecules Two or more atoms "linked" together Compounds Mixes of two or more elements bonded together Sig Fig.- x & / As many as the least number Sig Fig.- + & - As many as the least behind the decimal point Law of Definite Composition Components in a compound always have the same ratio by mass Law of Multiple Proportions Ratios of elements that combine to m...

CHEM 1212: Final Exam Questions and Answers Colligative Properties - CORRECT ANSWER-properties of solution, such as freezing point and boiling point, which depend on the concentration of solute particles dissolved in the solvent Freezing Point Depression Equation - CORRECT ANSWERMolality - CORRECT ANSWER-moles of solute per kg of solvent Molality= - CORRECT ANSWERWhat is the definition of colligative properties? (Antifreeze) - CORRECT ANSWERproperties of a solution that depend on the...

CHEM 1212: Final Exam Questions and Answers Colligative Properties - CORRECT ANSWER-properties of solution, such as freezing point and boiling point, which depend on the concentration of solute particles dissolved in the solvent Freezing Point Depression Equation - CORRECT ANSWERMolality - CORRECT ANSWER-moles of solute per kg of solvent Molality= - CORRECT ANSWERWhat is the definition of colligative properties? (Antifreeze) - CORRECT ANSWERproperties of a solution that depend on the...