Lecture 10 Electrolytes;Acid base reactions- Precipitation

Lecture 10 Electrolytes;Acid base reactions- Precipitation...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Lec-9: Electrolytes;Acid base reactions: Precipitation Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 1 Dilution of Concentrated Solutions Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 2
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Dilution of Concentrated Solutions Dilution The number of moles are the same in dilute and concentrated solutions. M dilute V dilute = moles = concentrated concentrated Think Moles ! Think Moles !! Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 3 Dilution of Concentrated Solutions What What volume 12.0 volume 12.0 M hydrochloric acid is required to make 500.0 required to make 500.0 mL mL of a 0.145 of a 0.145 M dilute solution? dilute dilute = moles = concentrated concentrated mol mol 0.145 0.5 12 1 conc LV LL mol L ×= × 0.145 0.5 0.0725 12 72.5 conc VL L Lm o l mL × = = Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 4
Background image of page 2
Question How many mL of commercial HCl (12.0 M) should you use to prepare 240.0 mL of 0.10 M HCl? A) 1.2 × 10 4 L B) 1.2 × 10 3 L C) 2.0 × 10 3 L D) 2.4 × 10 3 L C) 2.0 D) 2.4 M dilute V dilute = moles = concentrated concentrated 0.1 0.24 12 conc mol mol LV LL ×= × 1 0.1 0.24 0.002 12 2 conc mo lL VL L Lm o l L Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 5 2 mL = Electrolytes Ions exist in equilibrium with unionized substance HC 2 H 3 O 2 ( aq ) H + ( ) + C 2 H 3 O 2 - ( ) How do we test for this? Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 6
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Electrolytes HCl( aq ) H + ( aq ) + Cl - ( aq ) AStrong electrolyte - A Strong electrolyte conducts current efficiently Examples: NaCl, HNO 3 , HCl Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 7 Electrolytes Roy A. Lacey, Stony Brook University; Che 131, Spring 2011 8
Background image of page 4
Non-electrolyte (e.g., CH 3 OH): no ions are formed ` A solution in which no ionization
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/04/2011 for the course CHE 131 taught by Professor Kerber during the Spring '08 term at SUNY Stony Brook.

Page1 / 12

Lecture 10 Electrolytes;Acid base reactions- Precipitation...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online