Answer:
The concentration of HNO3 is 5*10^-5 M (option 2)
Explanation:
Step 1: Data given
Volume of HNO3 solution = 25.0 mL
Volume of 1*10^-4 M LiOH solution = 12.5 mL
Step 2: The balanced equation
HNO3 + LiOH → LINO3 + H2O
Step 3: Calculate the molar concentration of the HNO3.
b*Ca*Va = a*Cb*Vb
→ with Ca = the concentration of HNO3 = TO BE DETERMINED
→ with Va = the volume of HNO3 = 25.0 mL = 0.025 L
→ with Cb = the concentration of LiOH = 1.0 * 10^-4 M
→ with Vb = the volume of 12.5 mL = 0.0125 L
→ with a = the coefficient of HNO3 = 1
→ with b = the coefficient of LiOH = 1
1*Ca*0.025 L = 1 * 1*10^-4 * 0.0125 L
Ca = 0.00005M =5*10^-5 M
The concentration of HNO3 is 5*10^-5 M (option 2)
