Chemistry praxis - Study guides, Class notes & Summaries

Chemistry Praxis Exam Prep questions and answers 2024

CHEMISTRY PRAXIS Practice Exam Questions And Answers (Updated And Verified) What is the negative log of 1 X10⁻⁷ - answer7 When [H₃O⁺] = [OH⁻] the solution is acidic or basic or neutral - answerneutral The concentration of H₃O⁺ and OH⁻ in pure water at 25°C - answer1X10⁻⁷ Kw - answer1X10⁻¹⁴ pH + pOH = - answer14 What is the concentration of Hydrogen ion when the pH is 2 - answer1X10⁻² Using the - log [H⁺] or - log [H₃O⁺] helps you find the - answerpH U...

Intensive property A physical property of a substance that is not dependent on the size of mass of a sample, and cannot be determined by looking at the substance. Ex: density, mp, bp, temperature. Extensive property A physical property that depends on the amount of matter in a sample. Ex: mass, volume. Chemical property How a substance will change when it reacts with other substances and changes its chemical identity. Ex: flammability, oxidation state, toxicity. Periodic table -Arranged...

Chemistry Praxis Exam Prep Questions And Answers 2023 The specific heat of liquid water is 1 cal/kg°C. The specific heat of ice is half of that, at 0.5 cal/kg°C. Compared with that for 2 kg of liquid water, how much heat is needed to change the temperature of 2 kg of ice by 10°? 1. Four times as much heat is needed to change the temperature of the ice. 2. Twice as much heat is needed to change the temperature of the ice. 3. Half as much heat is needed to change the temperature of the...

Chemistry Praxis Exam Prep Questions And Answers 2023 The specific heat of liquid water is 1 cal/kg°C. The specific heat of ice is half of that, at 0.5 cal/kg°C. Compared with that for 2 kg of liquid water, how much heat is needed to change the temperature of 2 kg of ice by 10°? 1. Four times as much heat is needed to change the temperature of the ice. 2. Twice as much heat is needed to change the temperature of the ice. 3. Half as much heat is needed to change the temperature of the...

Chemistry Praxis Exam Prep Questions And Answers 2023 The specific heat of liquid water is 1 cal/kg°C. The specific heat of ice is half of that, at 0.5 cal/kg°C. Compared with that for 2 kg of liquid water, how much heat is needed to change the temperature of 2 kg of ice by 10°? 1. Four times as much heat is needed to change the temperature of the ice. 2. Twice as much heat is needed to change the temperature of the ice. 3. Half as much heat is needed to change the temperature of the...

Schrodinger (1925) Continued upon Bohr's findings to determine where electrons are typically found. Heisenberg (1927) Created the heisenberg uncertainty principle because you never can predict where the electron is. (Breaking Bad) De Broglie (1924) Electrons act like waves around the atom. Niels Bohr (Bohrbit) (1913) Electrons can orbit the nucleus in certain special orbits at different energy levels around the nucleus. Earnest Rutherford (foil) (1910) Fired beam of alpha particles at thin ...

Chemistry Content Knowledge: 5245 (Reactions/Structures) Exam Questions With 100% Correct Answers Polarimetry, Spectroscopy, Pressure Measurement - answerThree ways to measure a change in concentration Gas chromatography, mass spectrometry, titration - answerMethods used to measure slow reactions with aliquots Zero Order Reaction - answerrate of the reaction is independent of the concentration of the reactant Rate = k[A]⁰ = k First Order Reaction - answerrate of the reaction is direc...