leave space between each step to add more information. 1.write a balance chemical equation between...
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Leave space between each step to add more information.
1. Write a balance chemical equation between the acid and the base. Remember it’s a double replacement reaction with water and a salt forming.
2. Convert the molarity (M) to moles using the volume. You will need to change the volume to Liters (divide by 1000)
Directions for solving titration problems
3. Convert the moles of acid to moles of base (base to acid) using molar ratios from the balanced chemical equation.
4. To get concentration (molarity), divide the moles by the volume.
Directions for solving titration problems
Objectives
•Predict the product of an acid-base reaction.
•Calculate the molarity of an unknown acid or base.
Chapter 15 - Section 3 Neutralization and Titrations
Standards
• IE 1e Solve scientific problems by using quadratic equations and simple trigonometric, exponential and logarithmic function
Chapter 15 - Section 3 Neutralization and Titrations
Neutralization - All Neutralizations Are the Same Reaction
• A neutralization reaction is the reaction between an acid and base to form water molecules and a salt.
• When solutions of a strong acid and a strong base, having exactly equal amounts of H3O+(aq) and OH−(aq) ions, are mixed, the hydronium and hydroxide ions react to form water.
H3O+(aq) + OH−(aq) 2H2O(l)
Chapter 15 - Section 3 Neutralization and Titrations
• Suppose that hydrochloric acid, HCl, and the base was sodium hydroxide, NaOH are mixed.
• The result will be a solution of water and a salt
HCl + NaOH HOH + NaCl
Chapter 15 - Section 3 Neutralization and Titrations
Neutralization - All Neutralizations Are the Same Reaction
If 20.0 mL of 0.015 M aqueous hydrochloric acid is required to neutralize 30.0 mL of an
aqueous solution of calcium hydroxide, what is the concentration of the calcium
hydroxide solution?
1. Write a balance chemical equation between the acid and the base. Remember it’s a double replacement reaction with water and a salt forming.
HCl + Ca(OH)2 CaCl2 + HOH2 2
If 20.0 mL of 0.015 M aqueous hydrochloric acid is required to neutralize 30.0 mL of an aqueous
solution of calcium hydroxide, what is the concentration of the calcium hydroxide solution?
2. Convert the molarity (M) to moles using the volume. You will need to change the volume to Liters (divide by 1000)
moles molarity x ers)volume(lit
HCl M 0.015 x HCl L 0.0200
HCl mol 0.0003
If 20.0 mL of 0.015 M aqueous hydrochloric acid is required to neutralize 30.0 mL of an aqueous
solution of calcium hydroxide, what is the concentration of the calcium hydroxide solution?
3. Convert the moles of acid to moles of base (base to acid) using molar ratios from the balanced chemical equation.
HCl + Ca(OH)2 CaCl2 + HOH2 2
HCl mol 10 x 3.0 -4 HCl mol 2
Ca(OH) mol 1x 2
2Ca(OH) mol 0.00015
If 20.0 mL of 0.015 M aqueous hydrochloric acid is required to neutralize 30.0 mL of an aqueous solution of calcium
hydroxide, what is the concentration of the calcium hydroxide solution?
L 0.0300
Ca(OH) mol 0.00015 2
2Ca(OH) M 0.005
4. To get concentration (molarity), divide the moles by the volume.
L
moles M
2 Sig figs2
3-2
Ca(OH) M 10 x 5.0or Ca(OH) M 0.0050
Now you try!
A 25.0 mL solution of H2SO4 is completely neutralized by 18.0 mL
of 1.5 M NaOH using phenolphthalein as an indicator. What is the concentration of the
H2SO4 solution?
A 25.0 mL solution of H2SO4 is completely neutralized by 18.0 mL of 1.5 M NaOH using phenolphthalein as an indicator. What is the
concentration of the H2SO4 solution?
H2SO4 + NaOH Na2 SO4 + HOH2 2
NaOH M 1.5 x NaOH L 0.0180
NaOH mol 0.027
moles M x L
A 25.0 mL solution of H2SO4 is completely neutralized by 18.0 mL of 1.5 M NaOH using phenolphthalein as an indicator. What is the
concentration of the H2SO4 solution?
H2SO4 + NaOH Na2 SO4 + HOH2 2
NaOH mol 2
SOH mol 1 x 42 NaOH mol 0.027
42SOH mol 0.0135
A 25.0 mL solution of H2SO4 is completely neutralized by 18.0 mL of 1.5 M NaOH using
phenolphthalein as an indicator. What is the concentration of the H2SO4 solution?
H2SO4 + NaOH Na2 SO4 + HOH2 2
SOH L 0.025
SOH mol 0.0135
42
42
42SOH M 0.54
2 Sig figs42SOH M 0.54
L
moles M