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 Calculate the molality (m), boiling point elevation (ΔT_{b}) and freezing point depression (ΔT_{f}) for an aqueous solution made by dissolving 20.2 g of sucrose in 70.1 g of water.
(M_{m} C_{12}H_{22}O_{11} = 342.30 g/mol)
Boiling point elevation equation: ΔT_{b} = K_{b} · m, where K_{b} = 0.512°C/m
Freezing point depression equation: ΔT_{f} = K_{f} · m, where K_{f} = 1.86°C/m
Molality (m) 

ΔT_{b} (in °C) 

ΔT_{f} (in °C) 

 Calculate the number of moles of BaCl_{2} in 25.0 mL of a 0.150 M solution.
Number of moles of BaCl_{2} 

Calculate the molarity (M) of 208.25 g KBr in 0.750 L of solution?
(M_{m} KBr = 119.00 g/mol)
Concentration of KBr (in M) 

 What volume of 16.0 M HNO_{3} is needed to prepare 250. mL of dilute 0.500 M HNO_{3}?
Dilution equation: M_{conc}V_{conc} = M_{dil}V_{dil}
_{}
V_{conc} (in mL) 

What volume of this freshly prepared 0.500 M HNO_{3} would be needed to neutralize 2.00 g of Ca(OH)_{2}?
(M_{m} Ca(OH)_{2} = 74.09 g/mol)
Ca(OH)_{2}(s) + 2 HNO_{3}(aq) → Ca(NO_{3})_{2}(aq) + 2 H_{2}O(l)
V (in mL) 

 4.Hydrochloric acid is a common acid used in the undergraduate chemistry laboratory. It is a strong acid due to the fact that it completely ionizes according to the following equation:
HCl(aq) + H_{2}O(l) → Cl^{−}(aq) + H_{3}O^{+}(aq)
Consider a fairly dilute solution of HCl with a concentration of 0.025 M. Calculate the following information and be sure to show your work and how you arrived at your answers.
pH


pOH


[H_{3}O^{+}] (M)


[OH^{−}] (M)


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