6.3 quiz

Question 1

how would you calculate the molarity of a substance given the mass and volume?

Answer 1

1. start with mass divided by volume
2. divide by molar mass

Question 2

how would you calculate the mass of a substance given the molarity and volume?

Answer 2

1. start with volume
2. multiply by molarity divided by 1 L (not the L given in the problem!!)
3. multiply by molar mass

Question 3

how would you calculate the volume of a substance given the mass and molarity?

Answer 3

1. start with mass
2. divide by molar mass
3. divide by molarity

Question 4

what are the equations that make up the square of fun?

Answer 4

pH+pOH=14
pH=-log[H+]
[H+]=10^-pH
pOH=-log[OH-]
[OH-]=10^-pOH
[H+][OH-]=1x10^-14

Question 5

what is the formula for titration and how is it different from the regular formula?

Answer 5

MacidVacid(#H+)=MbaseVbase(#OH-)
you need to look in the chemical equation for the values used for H+ and OH-

Question 6

what do you need to know for writing reactions?

Answer 6

• include charges if applicable!!!
• if there is a dissociation eqn with an H anywhere in the formulas know that H+ will be one of your products and base the rest of the equation on that
• whenever there’s an acd-base neutralization H2O should be the only place where you see H in the products