Formulas for Chemistry 20

Question 1

How do you solve for graviametric stoichiometry?

Answer 1

1. Balance
2. Find the moles for given
3. Find the moles for required
4. Use the moles of required to determine the appropriate amount

Question 2

What is the formula for Boyle’s Law?

Answer 2

P1V1 = P2V2

Question 3

What is the formula for Charles’ Law?

Answer 3

V1 / T1 = V2 / T2

Question 4

What is the formula for Ideal Gas Law?

Answer 4

PV = nRT

Question 5

What is the formula for Combined Gas Law?

Answer 5

P1V1 / T1 = P2V2 / T2

Question 6

What is the formula for %volume by volume?

Answer 6

Vsolute / Vsolution x 100%

Question 7

What is the formula for %weight by volume?

Answer 7

Msolute / Vsolution x 100%

Question 8

What is the formula for %weight by weight?

Answer 8

Msolute / Msolution x 100%

Question 9

What is the formula for Law of Combining Volumes?

Answer 9

coefficient required / coefficient given x given amount

Question 10

What is the formula for Molar Volume?

Answer 10

N = V / Vm

Question 11

What is the formula for Concentration?

Answer 11

C = n / v

Question 12

What is the formula for dilution?

Answer 12

C1V1 = C2V2

Question 13

What is the 3 formulas that I can use for Ppm?

Answer 13

Ppm = msolute (g) / msolvent (g) x 10 to the power of 6

Ppm = msolute (mg) / Vsolvent (L)

Ppm = msolute (mg) / msolvent (kg)

Question 14

What is the formula to find hydronium?

Answer 14

[H3O+] = 10-(negative) pH

Question 15

What is the formula to find hydroxide?

Answer 15

[OH-] = 10-(negative) pH

Question 16

What is the formula to find pH?

Answer 16

pH = -log [H3O+]

Question 17

What is the formula to find pOH?

Answer 17

pOH = -log [OH-]

Question 18

How do you find percent yield?

Answer 18

%yield = actual amount produced / theoretical amount produced 100%

Question 19

What is the formula for percent error?

Answer 19

theoretical amount - actual amount / theoretical amount x 100%

Question 20

How do you solve for gaseous stoichiometry?

Answer 20

1. Balanced equation.
2. Moles of given substance (n = PV / RT) (n = m / M) or Molar Volume at STP or SATP (n = CV)
3. Moles of required substance (n = coefficient required / coefficient given x number of moles)
4. Moles of required to calculate appropriate amount requested (m = nM, PV = nRT, n = V / Vm)

Question 21

How do you solve for volumetric stochiometry?

Answer 21

1. Balanced equation.
2. Moles of given substance (n = CV or n = m / M)
3. Amount of moles of your required substance (n = coefficient required / coefficient given x number of moles)