Drill If I want to make a 2.3M solution of NaCl in 893mL of water, how many grams of NaCl do I need to add?

Answer 120 g NaCl

Drill – Take 2 If I have a concentrated solution of 15.0M solution in 3.0L of water, how much water do I need to add to make a 9.5M solution?

Answer 1.7 L

Agenda Drill Reading on Acids and Bases Look at pH paper Browsted-Lowry Acids and Bases Exit Slip Looking Forward

Bronsted-Lowry Theory Acid is any substance that donates a proton (H+) Base is any substance that can accept protons https://www.youtube.com/watch?v=ZiokqP0aZ1E

Proton Transfer Reactions Pairs of compounds are related to each other Known as acid-base pairs Acid has a conjugate base Base has a conjugate acid https://www.youtube.com/watch?v=fUhPLe0NAvA

Substances that can act as either an acid or a base Amphoteric Substances that can act as either an acid or a base

Upcoming… Wednesday Looking closer at pH pH and pOH calculations Friday Neutralization Titration Lab Monday/Wednesday/Friday – Time to complete Review Packet

A/B: NH3 + H2O  NH4+ + OH- Conjugate: H2SO4 + NH3  HSO4- + NH4+

Arrhenius Acids and Bases Acids dissociate in water to produce hydrogen ion H+ Bases dissociate in water to give hydroxide ions, OH-

Many substances do not contain OH- but still act like a base Arrhenius Problem Many substances do not contain OH- but still act like a base