CHEMISTRY PRAXIS Practice Exam Questions And Answers (Updated And Verified)

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 Using the - log [OH⁻] helps you find the - answerpOH If the pH is 2, then the pOH is - answer12 If the pOH is 6.2, then the pH is - answer7.8 If the pH is 5, then the [H⁺] = - answer1.0 x 10⁻⁵ mol/L If the pOH is 4, then the [OH⁻] = - answer1.0 x 10⁻⁴ mol/L If the [H⁺] or - [H₃O⁺] = 1.00 x 10⁻⁸ mol/L, then the pH = - answer8 If the [OH⁻] = 1 x 10⁻¹¹ mol/L, then the pOH = - answer11 pH scale - answer Litmus Paper - answer5-8 range Phenolphthalein - answer8.3-10 range (pink base) Equivalence point - answermol H+ = mol OH-, when exact amounts of chemicals are used Arrhenius Acid Base Definition - answerrelease H+ and release OH- Bronsted Lowry Acid Base Definition - answerProton acceptor and donor Lewis Acid Base Definition - answeracids are e- acceptors, bases are e- donors Ka - answerGreater Ka, stronger the acid Kb - answer Ka x Kb= - answerKw Percent Dissociation Acid - answerAmount dissociated/initial concentration Percent Dissociation Base - answerAmount dissociated/initial concentration Buffer - answerSolutions that resist a change in pH when you add a strong acid or base (ex: limestone and acid rain) Conjugate Acid/Base Pair - answer Titration curves: 1 weak and 1 strong - answer Titration curve: strong acid and strong base - answer HI - answerStrong Acid HBr - answerStrong Acid HClO4 - answerStrong Acid HCl - answerStrong Acid HClO3 - answerStrong Acid H2SO4 - answerStrong Acid HNO3 - answerStrong Acid NaOH - answerStrong Base KOH - answerStrong Base LiOH - answerStrong Base RbOH - answerStrong Base CsOH - answerStrong Base Ca(OH)2 - answerStrong Base Ba(OH)2 - answerStrong Base Sr(OH)2 - answerStrong Base