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Concentration of Solutions and Limiting Reactant Concept: Chemistry Exercises, Slides of Chemistry

Concentration of Solutions. ○ Calculate the mass of NaOH in 300.0 mL of an. 8.00% w/w NaOH solution. Density is 1.09 g/mL. Answer: 26.2 g NaOH ...

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2021/2022

Uploaded on 09/12/2022

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Concentration of Solutions
Mass of solute 1
% Mass of solute (W/W) = ----------------------- x 100 x --
Mass of solution d
*Mass of solution = mass of solute + mass of solvent
*d = density
Percent by Mass:
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Concentration of Solutions

Mass of solute^

% Mass of solute (W/W) = -----------------------

x 100 x --Mass of solution^ d Percent by Mass: Mass of solution = mass of solute + mass of solventd = density

Concentration of Solutions z^ Calculate the mass of 8.00% w/w NaOH solution thatcontains 32.0 g of NaOH.

Answer: 400. g solution

Concentration of Solutions z^ Calculate the mass of NaOH in 300.0 mL of an8.00% w/w NaOH solution. Density is 1.09 g/mL.

Answer: 26.2 g NaOH

Limiting Reactant Concept z^ Kitchen example of limiting reactant concept.1 packet of muffin mix + 2 eggs + 1 cup of milk

→^ 12 muffins

z^ How many muffins can we make with thefollowing amounts of mix, eggs, and milk?

Limiting Reactant Concept z^ Suppose a box contains 87 bolts, 110 washers, and 99nuts. How many sets, each consisting of one bolt, twowashers, and one nut, can you construct from thecontents of one box?

(^ )^ (^ ) (^ )^ numbersmallestby thedetermined

sets (^55) ismakecan set 1 sets^99 nuts 99 nut^1 number wemaximumthe

sets (^55) washers 2 set 1 sets^87 bolts 87 =bolt^1 set (^1) washers 110 =^ =

Limiting Reactant Concept z^ Look at a chemical limiting reactantsituation.Zn + 2 HCl

→^ ZnCl+ H^2

How^ many^ grams

of^ NH^ can^3

be^ prepared

from 89.78 g of N2 and 18.17 g of H

Answer: 102.3 g NH

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