Chemistry11SolutionChemistryI

Name:Date:Block:

1. Vocabulary2. Molarity3. Dilutions

VocabularySOLUTIONCHEMISTRY:

• Whatisasolution?o Homogeneousmixtureo Existsin__________phaseo Examples:

1. 2. 3.• Componentsofasolution:

o Solute:

o Solvent:

o Example:

• Water–themostcommonsolvent• Referredtoas“_______________”solutions• Fromnowon,assumethatthesolutionsdiscussedare“aqueous”solutionsMolarityPractice1.WhatisthemolarconcentrationofNaClinasolutioncontaining5.12gofNaClin250.0mLofsolution?

⇒ Whatarewegiven?

⇒ Whatunit(s)shouldourfinalanswerhave?

Practice2.WhatmassofNaOHiscontainedin3.50Lof0.200MNaOH?

⇒ Whatarewegiven?

⇒ Whatunit(s)shouldourfinalanswerhave?Practice3.HowmanymolesofAlCl3arecontainedin350.0mLof0.250MAlCl3?Practice4.HowmanygramsofCaCl2arecontainedin225mLof0.0350MCaCl2solution?Practice5.HowmanygramsofNa3PO4arecontainedin3.45Lof0.175MNa3PO4?Practice6.ThemolarconcentrationofpureHClO4is17.6M.Whatisthedensity(g/mL)ofpureHClO4?

Dilutions

n=numberofmolesV=volumec= =concentration

Theamountofthechemical(numberofmolesandmass)doesnotchange–onlytheconcentration.

Therefore,n1=n2

Sincen1=c1xV1andn2=c2xV2

Because….

Therefore,c1xV1=c2xV2Example1:If200.0mLof0.500MNaClisaddedto300.0mLofwater,whatistheresulting[NaCl]inthemixture?Example2:If20.0mLof0.75MHBrisdilutedtoatotalvolumeof90.0mL,whatisthemolarconcentrationoftheHBrintheresultingsolution?

Example3:Whatvolumeof12.0MNaOHisrequiredinordertoprepare3.00Lof0.750MNaOH?Example4:When350.0mLof0.250MMgCl2isboileddowntoafinalvolumeof275.0mL,whatisthemolarityoftheMgCl2intheresultingsolution?Molarity&DilutionsWorksheet