thepage="Solutions - Raoults' Law #2"
//updated 12/02/02-netscape 7
totl=0
corrt=0
theanswer=""
po1=po2=0
option=0
qchoice=0
missing=0
index1=index2=keyindex=0
alldata=0
second=first=0
cmpd=""
solved=0
var ie4=(document.all)?true:false;
thedata=new Array()
thedata[0]=new Array("acetaldehyde",833)
thedata[1]=new Array("acetone",227)
thedata[2]=new Array("benzene",97)
thedata[3]=new Array("chloroform",193)
thedata[4]=new Array("cyclohexane",93)
thedata[5]=new Array("cyclopentane",301)
thedata[6]=new Array("diethylamine",234)
thedata[7]=new Array("diethylether",528)
thedata[8]=new Array("diethylsulfide",59)
thedata[9]=new Array("ethanol",60.1)
thedata[10]=new Array("ethylmercaptan",519)
thedata[11]=new Array("heptane",45.7)
thedata[12]=new Array("hexane",150)
thedata[13]=new Array("methanol",127)
thephrase=new Array("A mixture of "," and ", " both of which are volatile, has the property shown below. What is the ","?")
qlist=new Array(" <B>liquid phase</B> mole fraction of "," pressure(torr) of "," total pressure(torr)"," <B>vapor phase</B> mole fraction of ")
datalabels=new Array("X<SUB>a(liq)</SUB>","X<SUB>b(liq)</SUB>","P<SUB>a</SUB>","P<SUB>b</SUB>","P<SUB>t</SUB>","X<SUB>a(vap)</SUB>","X<SUB>b(vap)</SUB>","P<SUp>o</SUp><SUB>a</SUB>","P<SUp>o</SUp><SUB>b</SUB>")
equations=new Array()
equations[0]=datalabels[7]+"*"+datalabels[0]+"+"+datalabels[8]+"*"+datalabels[1]+"="+datalabels[4]//raoults
equations[1]="1-"+datalabels[0]+"="+datalabels[1]//1-Xa=Xb
equations[2]=datalabels[7]+"*"+datalabels[0]+"="+datalabels[2]//Po*Xa=Pa
equations[3]=datalabels[2]+"/"+datalabels[7]+"="+datalabels[0]//Pa/Po=Xa
equations[4]=datalabels[2]+"/"+datalabels[4]+"="+datalabels[5]//Pa/Pt=Xva
equations[5]="1-"+datalabels[1]+"="+datalabels[0]//1-Xb=Xa
equations[6]=datalabels[8]+"*"+datalabels[1]+"="+datalabels[3]//Po*Xb=Pb
equations[7]=datalabels[3]+"/"+datalabels[8]+"="+datalabels[1]//Pb/Po=Xb
equations[8]=datalabels[3]+"/"+datalabels[4]+"="+datalabels[6]//Pb/Pt=Xvb
equations[9]=datalabels[7]+"+"+datalabels[8]+"="+datalabels[4]//Pa + Pb=Pt
equations[10]="("+datalabels[5]+"*"+datalabels[8]+")/("+datalabels[7]+"-("+datalabels[5]+"*"+datalabels[7]+")+("+datalabels[5]+"*"+datalabels[8]+"))="+datalabels[0]//Xa(liq) from Xa(vap)
equations[11]="("+datalabels[6]+"*"+datalabels[7]+")/("+datalabels[8]+"-("+datalabels[6]+"*"+datalabels[8]+")+("+datalabels[6]+"*"+datalabels[7]+"))="+datalabels[1]//Xb(liq) from Xb(vap)
equations[12]="1-"+datalabels[5]+"="+datalabels[6]//1-Xa=Xb(vapor)
equations[13]="1-"+datalabels[6]+"="+datalabels[5]//1-Xb=Xa(vapor)
eqnsets=new Array()
eqnsets[1]=new Array("1")
eqnsets[2]=new Array("2")
eqnsets[3]=new Array(1,6)
eqnsets[4]=new Array(1,0)
eqnsets[5]=new Array(1,2,6,9,4)
eqnsets[6]=new Array(1,2,6,9,8)
eqnsets[10]=new Array("5")
eqnsets[12]=new Array(5,2)
eqnsets[13]=new Array("6")
eqnsets[14]=new Array(5,0)
eqnsets[15]=new Array(5,2,6,9,4)
eqnsets[16]=new Array(5,2,6,9,8)
eqnsets[20]=new Array("3")
eqnsets[21]=new Array(3,1)
eqnsets[23]=new Array(3,1,6)
eqnsets[24]=new Array(3,1,0)
eqnsets[25]=new Array(3,1,6,9,4)
eqnsets[26]=new Array(3,1,6,9,8)
eqnsets[30]=new Array(7,5)
eqnsets[31]=new Array("7")
eqnsets[32]=new Array(7,5,2)
eqnsets[34]=new Array(7,5,2,9)
eqnsets[35]=new Array(7,5,2,9,4)
eqnsets[36]=new Array(7,5,2,9,8)
eqnsets[50]=new Array("10")
eqnsets[51]=new Array(10,1)
eqnsets[52]=new Array(10,2)
eqnsets[53]=new Array(10,1,6)
eqnsets[54]=new Array(10,1,0)
eqnsets[56]=new Array("12")
eqnsets[60]=new Array(11,5)
eqnsets[61]=new Array("11")
eqnsets[62]=new Array(11,5,2)
eqnsets[63]=new Array(11,6)
eqnsets[64]=new Array(11,5,0)
eqnsets[65]=new Array("13")

ansphrase=new Array()
inserts=new Array()
function startit(){
	clear()
	totl++
	document.forms[0].total.value=totl
	first=Math.floor(Math.random()*thedata.length);
	second=first
	while(second==first)second=Math.floor(Math.random()*thedata.length);
	mfl1=0;
	while(mfl1<.2 || mfl1>.8)mfl1=Math.random();
	createdata(mfl1)
	}
function createdata(mfl1){
	cmpd=new Array()
	cmpd[0]=thedata[first][0]
	cmpd[1]=thedata[second][0]
	mfl2=1-mfl1
	mfl1=number(mfl1,3,3)
	mfl2=number(mfl2,3,3)
	getpo()
	p1=number(mfl1*po1,3,3)
	p2=number(mfl2*po2,3,3)
	pt=number(1*p1+1*p2,3,3)
	mfv1=number(p1/pt,3,3)
	mfv2=number(p2/pt,3,3)	
	alldata=new Array(mfl1,mfl2,p1,p2,pt,mfv1,mfv2,po1,po2)
	buildquest()
}
function buildquest(){
	firstinsert="(P<sup>o</sup>="+alldata[7]+"torr)"
	secondinsert="(P<sup>o</sup>="+alldata[8]+"torr)"
	given=4
	while(given==4)given=Math.floor(7*Math.random())
	missing=given
	while(missing==given)missing=Math.floor(7*Math.random())
	keyindex=1*(""+given+missing)
	if(missing==4)finalinsert=qlist[2];
	else{
		if(missing>4)finalinsert=qlist[3]+cmpd[missing%5];
		else{(missing<2)?(finalinsert=qlist[0]+cmpd[missing%2]):(finalinsert=qlist[1]+cmpd[missing%2])};
	}
	dlabels=new Array("X<sub>liq</sub>=","P=","X<sub>vap</sub>=")
	given<5?toshow=("<b>"+cmpd[given%2]+":</b>"):toshow=("<b>"+cmpd[given%5]+":</b>");
	if(given>4)toshow+=dlabels[2]+"="+alldata[given];
	else{
	given<2?toshow+=(dlabels[0]+"="+alldata[given]):toshow+=(dlabels[1]+"="+alldata[given]);
	}
	thequest=thephrase[0]+cmpd[0]+firstinsert+thephrase[1]+cmpd[1]+secondinsert+thephrase[2]+finalinsert+thephrase[3]+"<br>"+toshow
	showquest(thequest)
	getsolutions()
	buildanswer()
	}
function getpo(){
	factor1=0
	factor2=0
	while(factor1<.8 || factor1>1.2)factor1=Math.random()*2;
	while(factor2<.8 || factor2>1.2)factor2=Math.random()*2;
	po1=number(factor1*thedata[first][1],3,3)
	po2=number(factor2*thedata[second][1],3,3)
}
function getsolutions(){
	solved=new Array()
	solved[0]=alldata[7]+"*"+alldata[0]+"+"+alldata[8]+"*"+alldata[1]+"="+alldata[4]//raoults
	solved[1]="1-"+alldata[0]+"="+alldata[1]//1-Xa=Xb
	solved[2]=alldata[7]+"*"+alldata[0]+"="+alldata[2]//Po*Xa=Pa
	solved[3]=alldata[2]+"/"+alldata[7]+"="+alldata[0]//Pa/Po=Xa
	solved[4]=alldata[2]+"/"+alldata[4]+"="+alldata[5]//Pa/Pt=Xva
	solved[5]="1-"+alldata[1]+"="+alldata[0]//1-Xb=Xa
	solved[6]=alldata[8]+"*"+alldata[1]+"="+alldata[3]//Po*Xb=Pb
	solved[7]=alldata[3]+"/"+alldata[8]+"="+alldata[1]//Pb/Po=Xb
	solved[8]=alldata[3]+"/"+alldata[4]+"="+alldata[6]//Pb/Pt=Xvb
	solved[9]=alldata[2]+"+"+alldata[3]+"="+alldata[4]//Pa + Pb=Pt
	solved[10]="("+alldata[5]+"*"+alldata[8]+")/("+alldata[7]+"-("+alldata[5]+"*"+alldata[7]+")+("+alldata[5]+"*"+alldata[8]+"))="+alldata[0]//Xa(liq) from Xa(vap)
solved[11]="("+alldata[6]+"*"+alldata[7]+")/("+alldata[8]+"-("+alldata[6]+"*"+alldata[8]+")+("+alldata[6]+"*"+alldata[7]+"))="+alldata[1]//Xb(liq) from Xb(vap)
solved[12]="1-"+alldata[5]+"="+alldata[6]//1-Xa=Xb(vapor)
solved[13]="1-"+alldata[6]+"="+alldata[5]//1-Xb=Xa(vapor)

}
function buildanswer(){
	theanswer="<br>The solution to this problem involves the following:"
	theeqn=geteqn()
	theanswer+="<br>"+theeqn
}
function geteqn(){
	theeqn="<br>"
	for(var j=0;j<eqnsets[keyindex].length;j++)theeqn+=equations[eqnsets[keyindex][j]]+"   <B>=></B>   "+solved[eqnsets[keyindex][j]]+"<br>";
	return theeqn
	}
function answer(ans){
if(tried==1)alert("Sorry, you've already submitted this problem! We'll get you a new one!");		
else{	attempts++
 	if(tried==2){totl++;document.forms[0].total.value=totl}
	if (ans>.95*alldata[missing]& ans<1.05*alldata[missing]){
		document.forms[0].results.value="correct"
		corrt++
		document.forms[0].correct.value=corrt
		tried=1
		}
	else {
		tried=2
		document.forms[0].results.value="incorrect"
	}
}}