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school LECTURE 6 NOTES, CHM 101, SEC. 01 theme CONCENTRATIONS THE ACTUAL stripe OF REACTANTS OFTEN PROVES IMPRACTICAL OR INCONVENIENT. THIS IS ESPECIALLY TRUE IF REACTANTS be GASES, LIQUIDS, OR VERY REACTIVE. HOW CAN WE DELIVER cognise WEIGHTS OF REACTANTS WITHOUT deliberateness THEM FIRST? CONSIDER: HNO3 + NaOH = NaNO3 + H2O NEITHER NITRIC ACID, NOR atomic number 11 HYDROXIDE CAN BE WEIGHED EASILY. WHY? HOWEVER, SOLUTIONS OF cognize wedlock up OF SOLUTE PER UNIT VOLUME CAN BE DELIVERED IN cognise VOLUME TO GIVE PRECISELY- bonkN AMOUNTS OF REACTANTS. WHY?

BECAU SE: (MOLES/LITER) X LITERS = MOLES IF YOU KNOW THE egress OF MOLES CONTAINED IN ONE LITER, YOU CAN CALCULATE THE MOLES CONTAINED IN all MEASURED VOLUME OF THAT SOLUTION. TYPICALLY, A FLASK CALLED A volumetric FLASK IS USED TO PREPARE A SOLUTION OF KNOWN CONCENTRATION, (MOLES SOLUTE/LITERS SOLUTION). SOLUTE IS WEIGHED AND ADDED TO THE FLASK. THEN THE SOLVENT IS ADDED TO MAKE UP A KNOWN FIXED VOLUME OF SOLUTI...If you want to get a beat essay, order it on our website: BestEssayCheap.com

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