1. Consider the following chemical reaction: HCl(aq) + NaOH(aq) ? H2O(l) + NaCl(
ID: 704084 • Letter: 1
Question
1. Consider the following chemical reaction:
HCl(aq) + NaOH(aq) ? H2O(l) + NaCl(aq)
Calculate the moles of NaOH (aq) required to neutralize 22.51 mL of 0.100 M HCl (aq).
2-
HBr(aq) + NaOH(aq) ? H2O(l) + NaBr(aq)
25.00 mL of an HBr (aq) solution of unknown molarity reacts with 28.29 mL of 0.1500 M NaOH (aq). What is the Molarity of the HBr (aq) solution?
3-
A simulated seawater sample contains 0.572 M NaCl (aq) and 0.0596 M MgCl2 (aq). Assuming NaCl and MgCl2 are strong electrolytes (dissociate completely into ions), calculate the Molarity of Cl-(aq) in this solution.
4-
A titration is performed according to the following equation:
H2SO4 (aq) + 2 NaOH(aq) ? 2 H2O(l) + Na2SO4 (aq)
How many milliliters of 0.140 M NaOH (aq) are required to neutralize 17.53 mL of 0.100 M H2SO4 (aq)?
5-
2 K3PO4 (aq) + 3 Co(NO3)2 (aq) ? Co3(PO4)2 (s) + 6 KNO3 (aq)
What volume of 0.222 M K3PO4 (aq) in milliliters is needed to react with 35.31 mL of 0.250 M Co(NO3)2 (aq)?
6-
onsider the following precipitation reaction:
5 Fe2+(aq) + MnO4-(aq) + 8 H+(aq) ? 5 Fe3+(aq) + Mn2+(aq) + 4 H2O(l)
An iron sample weighing 0.374 g is converted into Fe2+(aq) and requires 31.57 mL of MnO4-(aq) according to the equation above. What is the Molarity of the MnO4-(aq) solution?
A simulated seawater sample contains 0.572 M NaCl (aq) and 0.0596 M MgCl2 (aq). Assuming NaCl and MgCl2 are strong electrolytes (dissociate completely into ions), calculate the Molarity of Cl-(aq) in this solution.
4-
A titration is performed according to the following equation:
H2SO4 (aq) + 2 NaOH(aq) ? 2 H2O(l) + Na2SO4 (aq)
How many milliliters of 0.140 M NaOH (aq) are required to neutralize 17.53 mL of 0.100 M H2SO4 (aq)?
5-
2 K3PO4 (aq) + 3 Co(NO3)2 (aq) ? Co3(PO4)2 (s) + 6 KNO3 (aq)
What volume of 0.222 M K3PO4 (aq) in milliliters is needed to react with 35.31 mL of 0.250 M Co(NO3)2 (aq)?
6-
onsider the following precipitation reaction:
5 Fe2+(aq) + MnO4-(aq) + 8 H+(aq) ? 5 Fe3+(aq) + Mn2+(aq) + 4 H2O(l)
An iron sample weighing 0.374 g is converted into Fe2+(aq) and requires 31.57 mL of MnO4-(aq) according to the equation above. What is the Molarity of the MnO4-(aq) solution?
Explanation / Answer
Ans 1 :
The equimolar amounts of both the reagents are required in the balanced reaction
Number of moles of HCl = 0.100 x 0.02251 = 0.002251 moles
So number of moles of NaOH required will also be = 0.002251 moles
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