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Chapter 4: Q4.51P (page 180)

If 25.98 mL of a standard 0.1180 M KOH solution reacts with 52.50 mL of solution, what is the molarity of the acid solution?

Short Answer

Expert verified

The molarity of the acid solution is 0.058 M.

Step by step solution

01

Write the balanced molecular equation

The reaction of potassium hydroxide and acetic acid is shown below.

$K O H (a q) + C H_{3} C O O H (a q) \to C H_{3} C O O K (a q) + H_{2} O (l)$

02

Calculate the moles of acetic acid

Given values are:

$v o l u m e o f s t a n d a r d 0.1180 M K O H s o l u t i o n = 25.98 m l v o l u m e o f a c e t i c a c i d s o l u t i o n = 52.50 m l$

Moles of acetic acid is:

$\begin{array}{rcl} m o l e s o f a c e t i c a c i d & = & 25.98 m l K O H \times \frac{1 l i t}{1000 m l} \times \frac{0.1180 m o l K O H}{1 l i t K O H s o l u t i o n} \times \frac{1 m o l C H_{3} C O O H}{1 m o l K O H} \\ = & 3.07 x 10^{- 3} m o l C H_{3} C O O H \end{array}$

03

Calculate the molarity of acetic acid

The molarity of the acid solution is:

$m o l a r i t y o f a c i d s o l u t i o n = \frac{m o l e s o f a c e t i c a c i d}{v o l u m e o f a c e t i c a c i d}$

The molarity of acetic acid is calculated as:

$= \frac{3.07 x 10^{- 3} m o l C H_{3} C O O H}{(52.50 m l) (\frac{1 l i t}{1000 m l})} = 0.058 M C H_{3} C O O H s o l u t i o n$

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Most popular questions from this chapter

Iron reacts rapidly with chlorine gas to form a reddish brown, ionic compound (A), which contains iron in the higher of its two common oxidation states. Strong heating decomposes compound A to compound B, another ionic compound, which contains iron in the lower of its two oxidation states. When compound A is formed by the reaction of 50.6 g of Fe and 83.8 g of Cl₂ and then heated, how much compound B forms?

Is the following a redox reaction? Explain

{NH}_{3} (aq) +HCl (aq) \to {NH}_{4} Cl (aq)

How many moles and numbers of ions of each type are present in the following aqueous solutions?

(a) 88 mL of 1.75 M magnesium chloride

(b) 321 mL of a solution containing 0.22 g aluminum sulfate/L

(c) 1.65 L of a solution containing 8.83 x 10²¹ formula units of cesium nitrate per liter.

Identify the oxidizing and reducing agents in the following:

$(a) 8 H^{+} (a q) + C r_{2} O_{7}^{2 -} (a q) + 3 S O_{3}^{2 -} (a q) \to 2 C r^{3 +} (a q) + 3 S O_{4}^{2 -} (a q) + 4 H_{2} O (l) (b) N O_{3}^{-} (a q) + 4 Z n (s) + 7 O H^{-} (a q) + 6 H_{2} O (l) \to 4 Z n {(O H)}_{4}^{2 -} (a q) + N H_{3} (a q)$

Physicians who specialize in sports medicine routinely treat athletes and dancers. Ethyl chloride, a local anesthetic commonly used for simple injuries, is the product of the combination of ethylene with hydrogen chloride:

$C_{2} H_{4} (g) + HCI (g) \to C_{2} H_{5} CI (g)$

If 0.100 kg of C2H4 and 0.100 kg of HCl react:

(a) How many molecules of gas (reactants plus products) are present when the reaction is complete?

(b) How many moles of gas are present when half the product forms?

See all solutions

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