[PDF] PREPARING SOLUTIONS AND MAKING DILUTIONS PDF solutions.pdf

However, if you are asked to make a 1:3 dilution of acetic acid in ethanol, you would mix one unit below is a quick approach to calculating such dilutions where: mixed as dry mass (g) per volume where #g/100 ml = percent concentration

Calculating the percentage or ratio strength of a solution made by diluting or con- centrating (by 30 mL of a folic acid dilution in a 100 mcg/mL concentration

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acid (CA) and reverse osmosis (RO) water required for your desired solution For example: a 2000 ml amount of 20 percent citric acid would be made from 436

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- 1 ml of purified water weighs 1 gram - 15 percent of the 1000 ml solution must be citric acid - 15 (0 15) x 1000 = 150 ml (or

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these calculations It is best to convert any ratio strengths to a percent We assume If you add 3 g of salicylic acid to 97 g of an ointment base, what is the final

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calculations of concentration for some dosage forms calculations involving percentage concentration l How many grams of aminobenzoic acid should be

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Example: Prepare 100 mL of 1 0 M hydrochloric acid from Calculating Molarity from Percent Solutions Add solid to acid solution, stir, then add to water

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25 avr 2016 · ➢Percent solutions (= parts per hundred) ➢Molar solutions However, to make 1:3 dilution of acetic acid in ethanol, Calculate molarity M=

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Calculating Drug Doses Percentages what is the percentage strength of a solution that 5 Prepare 1 L of 2 acetic acid using water and vinegar (5 )

NOTE:..

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How to Make Simple Solutions and Dilutions

Unit Definitions

milligram " gram " kilogram " mole "(%)'!#% molarity " molar "" eg)* millimole "#$#%%% millimolar "" eg)% 1. Simple Dilution (Dilution Factor Method).. simple dilution unit volume + solvent + ,dilution factor 0#*0 12 #12"*" )33 4 050
667
)%5 8 050
!).#5

667)%5667

)%5667#3

2. Mixing parts or volumes..

0# 0! 9 7 !.4 8 7 :4 0000 #4

3. Serial Dilution..

serial dilution /etc , 4 total dilution factor product -;- ";-#=;-)=;-'etc !.4 >4??@9)%# three step #.#%% ##%A 33

33%A "#.#%%4!

of the 1:100 dilution 33
#.#%%=#%%"#.#%%%%B less

4. Making fixed volumes of specific concentrations from liquid reagents: V1C1=V2C2..

CD eg

V = volumeC = concentration;

V1C1=V2C2

!#.6 $"C1 )%%A"C2 $"V2 9 V1 )%%A V1 " D

This is your unknown.

C1 "#%%

V2 "")%%A"%)

C2 "")*

C #"C)!7) $7# C "%%*"*%A 6*%A #*%A A)*

5. Molar solutions (unit = M = moles/L)..

6 molarity +#formula weight -E molecular weight !#.To prepare a liter of a simple molar solution from a dry reagent: formula weight E

7-E"#32'

$F%#* #32' $")3#2* !).To prepare a specific volume of a specific molar solution from a dry reagent: -E#G% 8 H $ =-E H $ =-E H "%%)*=%#*$=#G% H "%(I*

6)%#

%(I*

6. Percent Solutions (= parts per hundred)..

percent concentrations. E dry mass (g) per volume H $#%%"#%J<7 <7 #%J$<7 !#.4'J$<7 <7#%% 8 #J$ !).,'*%#)J$<7 !'*"2) 62)
<7'*% !'.#*%%*J$ %%*=#*$#%% "%%%I* I*

6%%%I*

E liquid reagents volume per volumeieH !2.4I%J$!I%#%%J !*.,3#))#*J$,5&#%% )#*=3#)$#%% "#3(#

6!#3(#,5&#%%I#3)#J$

7. Conversions from % to molarity and from molarity to %..

To convert from % solution to molarity

Molarity = (% solution) * 10

Xxxxx FW

!(.,(*J -E"')*( K(* $#%% =#%L$')*( %#33(

To convert from molarity to percent solution-E

% solution = molarity * FW xxxxxxxxxx10 !I.7%%%2* -E#IGI

K%%%2*

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