C215 EXAM-QUESTIONS WITH CORRECT ANSWERS

C215 EXAM-QUESTIONS WITH CORRECT ANSWERS Calculations: Corrected Gas Pressure - Answer- - Gauge pressure read (Psig) must be corrected to include the atmospheric pressure (Psia) asserted on the gauge - P corrected = Gauge Pressure Read (Psig) + Atmospheric Pressure (Psia) Acids - Answer- - Substances that produce H+ in solution Bases - Answer- - Substances that produce OH- in solution Acid-Base Reaction (Neutralization Reaction) - Answer- - Acid & base neutralize each other properties - H+ from the acid combines with the OH- from the base to make water - The CATion from the base combines with the ANion from the acid to make salt - Acid + Base -> Salt + Water Titration - Answer- - A solution of known concentration is used to determine the concentration of another solution. - The unknown solution is added slowly from an instrument (burette) Equivalent Point - Answer- - Point in a titration where the number of moles of hydrogen ions equals the number of moles of hydroxide ions - An exact point that is hard to determine End Point - Answer- - The point where the indicator stopped (changes color) - An approximate point that depends on how the end point is determined - Very close to equivalent point - Used in titration calculations