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Chapter 9: Q. 9.15 (page 294)

Calculate the number of equivalents in each of the following:
a. $1 mole of K^{+}$
b. ${2molesofOH}^{-}$
c. $1 {mole ofCa}^{2 +}$
d. ${3molesofCO}_{3}^{2 -}$

Short Answer

Expert verified

(part a) The number of equivalents in $1 mole of K^{+} = 1 e q$

(part b) The number of equivalent in ${2molesofOH}^{-} =2eq$

(part c) The number of equivalent in $1 {mole ofCa}^{2 +} =2eq$

(part d) The number of equivalent in ${3molesofCO}_{3}^{2 -} = 6 e q$

Step by step solution

01

Introduction (part a).

The number of equivalents seems to be the amount of electrons or ions which can be transmitted in a chemical reaction.

02

Given Information (part a).

$1 mole of K^{+}$

03

Explanation (part a).

Every mole has one equivalent for an ion with a charge of $+ .$

Hence, $1 mole of K^{+} = 1 eq$

04

Given Information (part b).

${2molesofOH}^{-}$

05

Explanation (part b).

Each mole has one equivalent for just an ion with a charge of $- .$

Hence, ${2molesofOH}^{-} =2eq$

06

Given Information (part c).

$1 {mole ofCa}^{2 +}$

07

Explanation (part c).

Each mole has two equivalents for something like an ion with a charge of $2 + .$

Therefore, $1 {mole ofCa}^{2 +} =2eq$

08

Given Information (part d).

${3molesofCO}_{3}^{2 -}$

09

Explanation (part d).

Each mole has two equivalents for such an atom with a charge of $2^{-} .$

Hence, ${3molesofCO}_{3}^{2 -} = 6 e q$

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Most popular questions from this chapter

Will a red blood cell undergo crenation, hemolysis, or no change in each of the following solutions?

a. $1 % (m / v)$ glucose

b. $2 % (m / v) N a C l$

c. $5 % (m / v)$ glucose

d. $0.1 % (m / v) N a C l$

Select the diagram that represents the shape of a red blood cell when placed in each of the following a to $e : (9.6)$

a. $0.9 % (m / v) NaCl$ solution

b. localid="1654008537048" $10 % (m / v)$ glucose solution

c. localid="1654008233523" $0.01 % (m / v) N a C l$ solution

d. localid="1654008237506" $5 % (m / v)$ glucose solution

e. localid="1654008241312" $1 % (m / v)$ glucose solution

State whether each of the following refers to a saturated or an unsaturated solution:

a. A spoonful of salt added to boiling water dissolves.

b. A layer of sugar forms on the bottom of a glass of tea as ice is added.

c. A kidney stone of calcium phosphate forms in the kidneys when urine becomes concentrated.

Calculate the mass percent $(m / m)$ for the solute in each of the following:

a. $25 g o f K C l$ and $125 g o f H_{2} O$

b. $12 g$ of sucrose and $225 g$ of tea solution.

c. $8.0 g o f C a C l_{2}$ and $80.0 g o f C a C O_{2}$ solution.

a. If black spheres are carbon atoms, white spheres are hydrogen atoms, and red spheres are oxygen atoms, what is the molecular formula of butyric acid?

b. What is the molar mass of butyric acid?

c. How many grams of butyric acid contain $3.28 脳 10^{23}$ atoms of oxygen?

d. How many grams of carbon are in 5.28g of butyric acid?

e. Butyric acid has a density of 0.959 g/ml. How many moles of butyric acid are contained in 1.56 ml of butyric acid?

f. Identify the bonds C-C, C-H, and C-O in a molecule of butyric acid as polar covalent or nonpolar covalent.

See all solutions

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