Chem 152 Study guides, Class notes & Summaries

System - The portion of the universe we have singled out for study surroundings - Everything else in the universe universe - System and surroundings work - the action of a force through a distance heat - Transfer of energy from hotter to colder object heat capacity - The amount of heat needed to raise the temperature by 1 K Heat Tax - Increase in surroundings comes from the heat from the system Kinetic energy - Energy of motion potential energy - Energy of an object by virtue of its posi...

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...

QSP EXAM 3: CHEM 1520 Q&A RATED A.QSP EXAM 3: CHEM 1520 Q&A RATED A.QSP EXAM 3: CHEM 1520 Q&A RATED A.QSP EXAM 3: CHEM 1520 Q&A RATED A.QSP EXAM 3: CHEM 1520 Q&A RATED A.QSP EXAM 3: CHEM 1520 Q&A RATED A.QSP EXAM 3: CHEM 1520 Q&A RATED A.QSP EXAM 3: CHEM 1520 Q&A RATED A.QSP EXAM 3: CHEM 1520 Q&A RATED A.QSP EXAM 3: CHEM 1520 Q&A RATED A.QSP EXAM 3: CHEM 1520 Q&A RATED A.QSP EXAM 3: CHEM 1520 Q&A RATED A.

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...

University of Washington CHEM 152 Wiegand, lab 2, Weak Acid Titration

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 = ...

DATA AND CALCULATIONS A: Heat Capacity of the Calorimeter Run 1 Run 2 Run 3 Voltage, V (J/C) 2.2 2.2 2.2 Current, A (C/s) 2.24 2.28 2.25 Time (s) 420 410 420 Initial temperature, oC 25.7 26.4 26.7 Final temperature, oC 30.4 31.0 31.3 *Energy into calorimeter from power supply, (q), J 2070 2060 2080 *Heat Capacity of Calorimeter, Ccal, J/oC 440 447 452 Average, Ccal 446 J/oC Standard Dev 5.81 J/oC B: Enthalpy of Fusion of Water Run 1 Run 2 Ccal(Average), J/oC 446 446 Mass of calori...

1. For lower premolars, the purpose of inclining the handpiece lingually is to, A. Avoid buccal pulp horn B. Avoid lingual pulp horn C. Remove unsupported enamel D. Conserve lingual dentine - ANSWER A. Avoid buccal pulp horn Explanation 1- avoid BUCCAL pulp horn 2- conserve ling. dentine So take A and B if available 2. For an amalgam restoration of a weakened cusp you should, A. reduce cusp by 2mm on a flat base for more resistance B. reduce cusp by 2mm following the outli...

Chem 152 Experiment #5: Thermodynamics II The Temperature Dependence of the Solubility Product (Ksp) By signing below, you certify that you have not falsified data, that you have not plagiarized any part of this lab report, and that all calculations and responses other than the reporting of raw data are your own independent work. Failure to sign this declaration will result in 5 points being deducted from your report score. Note: All sections of this report must be typed Type the calcul...

Comprehensive class notes for Chem 152 at the University of Arizona with Dr. Hidalgo.