Exam 3 chem 1520 - Study guides, Class notes & Summaries

Exam 3 - Chem 1520 Questions And Answers acid-base indicator - ANS-a weak organic acid whose color differs from that of its conjugate base pH - ANS-the color of an indicator changes over a specific, narrow ____ range, a range of about 2 units neutralizing - ANS-in an acid-base titration, the concentration of an acid (or a base) is determined by _________________ the acid (or base) with a solution of a base (or acid) of a known concentration equivalence - ANS-The ______________ point of the...

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Chem 1520 Exam 3 – Questions & Answers (100% Correct) Chem 1520 Exam 3 – Questions & Answers (100% Correct) a weak organic acid whose color differs from that of its conjugate base - ANSWER - acid-base indicator the color of an indicator changes over a specific, narrow ____ range, a range of about 2 units - ANSWER - pH in an acid-base titration, the concentration of an acid (or a base) is determined by _________________ the acid (or base) with a solution of a base (or acid) of a kno...

Chem 1520 Exam: Types of Calculation Questions & Answers (100% Correct) Chem 1520 Exam: Types of Calculation Questions & Answers (100% Correct) Calorimetry Calculations: 1. 2.50 kJ of energy changes the temperature of a sample of lead by 8.52 degrees C. What is the mass of the sample? - ANSWER - Q = mcΔT m=Qc/Δt m = 2500/0.13(8.52) = 2.3×103 g 2. 950.3 J of energy is removed from 28.5 g of water at 80.3 degrees C. What is the final temperature? - ANSWER - Q = mcΔT −950.3 = ...