Answer:
Molarity of Unknown Acid = 0.1332 M
Explanation:
Data for solving problem:
Molarity of base in buret (M₁)= 0.1517 M
volume of the acid in Erlenmeyer flask (V₂)= 25.0 mL
Volume of the base in the buret (V₁) = final volume of buret - initial volume in buret
final volume of buret = 22.5 mL
initial volume in buret = 0.55 mL
So
Volume of the base in the buret (V₁) = 22.5 mL -0.55 mL = 21.95 mL
Volume of the base in the buret (V₁) = 21.95 mL
Molarity of Unknown acid in the Erlenmeyer flask (M₂) = To be find
Explanation:
It is acid base titration and formula for this titration is as follows:
Molarity of base x Volume of base = Molarity of acid x volume of acid
it can be written as
M₁V₁ = M₂V₂ -------------------- equation (1)
we have to find M₂
so by rearrangment the equation (1)
M₁V₁ / V₂ = M₂ ------------------ equation (2)
put the values in equation in equation (2)
M₂ = 0.1517 M x 21.95 mL / 25.0 mL
M₂ = 3.3298 /25.0
M₂ = 0.1332 M
so the Molarity of Unknown acid is <u>0.1332 M</u>
and any get of units that has those units in the proper place can be considered a density unit. The ones that has those specifically are A, B, E and F