thepage="Faraday(143)"
//updated netscape 7
//global variables
refnumber=186
attempts=0
tried=0
which=0
theanswer=0
corrt=0
totl=0
anskey=prodcon=0
volt=0
faradays=0
equivs=0
qunit=""
times=new Array()
function redox(first,second,pot,num,m1,m2){
this.first=first
this.second=second
this.pot=pot
this.num=num
this.m1=m1
this.m2=m2
}
function parts(p1,p2,p3,p4,p5,p6,p7,p8,p9){
this.p1=p1
this.p2=p2
this.p3=p3
this.p4=p4
this.p5=p5
this.p6=p6
this.p7=p7
this.p8=p8
this.p9=p9
}
quest=new parts("If the process below is driven electrolytically, how many "," of material will be "," at the "," by a current of "," amps flowing for " )
options=new Array(" produced "," consumed ")
ansphrase=new parts("Since the potential for the reaction as written is ","volts, the reaction will be driven "," and "," at the "," will be ",". First, calculate the number of coulombs (current*t(sec)): "," Then, the number of Faradays(coulombs/96500):"," Divide that result by the number of electrons per mole:"," and finally multiply by the gaw or gfw, as appropriate:")
halfrxn=new Array()
halfrxn[1]=new redox("Li+(aq)","Li(s)",-3.04,1,6.94,6.94)
halfrxn[2]=new redox("K+(aq)","K(s)",-2.92,1,39.1,39.1)
halfrxn[3]=new redox("Ca2+(aq)","Ca(s)",-2.76,2,40.1,40.1)
halfrxn[4]=new redox("Na+(aq)","Na(s)",-2.71,1,23,23)
halfrxn[5]=new redox("Mg2+(aq)","Mg(s)",-2.38,2,24.3,24.3)
halfrxn[6]=new redox("Al3+(aq)","Al(s)",-1.66,3,27,27)
halfrxn[7]=new redox("MnO4-(aq)","Mn2+(aq)",1.49,5,118.9,54.9)
halfrxn[8]=new redox("Zn2+(aq)","Zn(s)",-.76,2,65.4,65.4)
halfrxn[9]=new redox("Cd2+(aq)","Cd(s)",-.40,2,112.4,112.4)
halfrxn[10]=new redox("Ni2+(aq)","Ni(s)",-.23,2,58.7,58.7)
halfrxn[11]=new redox("Sn2+(aq)","Sn(s)",-.14,2,118.7,118.7)
halfrxn[12]=new redox("Pb2+(aq)","Pb(s)",-.13,2,207.2,207.2)
halfrxn[13]=new redox("Fe3+(aq)","Fe(s)",-.04,3,55.85,55.85)
halfrxn[14]=new redox("Fe2+(aq)","Fe(s)",-.41,2,55.85,55.85)
halfrxn[15]=new redox("AgBr(s)","Ag + Br-(aq) ",.071,1,187.8,187.8)
halfrxn[16]=new redox("Sn4+(aq)","Sn2+(aq)",.15,2,118.7,118.7)
halfrxn[17]=new redox("Cu2+(aq)","Cu+(aq)",.16,1,63.55,63.55)
halfrxn[18]=new redox("AgCl(s)","Ag + Cl-(aq)",.22,1,143.32,143.32)
halfrxn[19]=new redox("Cu2+(aq)","Cu(s)",.34,2,63.55,63.55)
halfrxn[20]=new redox("S(s)","H2S(g)",.14,2,32,34)
halfrxn[21]=new redox("Cu+(aq)","Cu(s)",.52,1,63.55,63.55)
halfrxn[22]=new redox("Fe3+(aq)","Fe2+(aq)",.77,1,55.85,55.85)
halfrxn[23]=new redox("Ag+(aq)","Ag(s)",.80,1,107.9,107.9)
halfrxn[24]=new redox("Co3+(aq)","Co2+(aq)",1.82,1,58.93,58.93)
halfrxn[25]=new redox("La3+(aq)","La(s)",-2.38,3,138.9,138.9)
halfrxn[26]=new redox("U3+(aq)","U(s)",-1.66,3,238,238)
halfrxn[27]=new redox("Cr2+(aq)","Cr(s)",-.90,2,52,52)
halfrxn[28]=new redox("Ce4+(aq)","Ce3+(aq)",1.44,1,140.1,140.1)
halfrxn[29]=new redox("Hg2+(aq)","Hg(l)",.85,2,200.6,200.6)
halfrxn[30]=new redox("ClO2-(aq)","ClO-(aq)",-.13,2,67.45,51.45)
halfrxn[31]=new redox("ClO4-(aq)","Cl-(aq)",1.37,8,99.45,35.45)
halfrxn[32]=new redox("Ag2+(aq)","Ag+(aq)",1.98,1,108.7,108.7)
halfrxn[33]=new redox("Cu2+(aq) + I-(aq)","CuI(s)",.86,1,190.5,190.5)
halfrxn[34]=new redox("ClO3-(aq)","ClO2(g)",1.175,1,83.45,67.45)
halfrxn[35]=new redox("MnO4-(aq)","MnO42-(aq)",.56,1,118.9,118.9)
halfrxn[36]=new redox("MnO2(s)","Mn2+(aq)",1.23,2,86.94,54.94)
halfrxn[37]=new redox("PbO2(s)","PbO(s)",.28,2,239.2,223.2)
halfrxn[38]=new redox("Au3+(aq)","Au+(aq)",1.36,2,197,197)
halfrxn[39]=new redox("MnO4-(aq)","MnO2(s)",1.70,3,118.9,86.94)
halfrxn[40]=new redox("H2SO3(aq)","S(s)",.450,4,82,32)
halfrxn[41]=new redox("HAsO2(aq)","As(s)",.240,3,107.9,74.9)
halfrxn[42]=new redox("Sr2+(aq)","Sr(s)",-2.89,2,87.6,87.6)
halfrxn[43]=new redox("Ti2+(aq)","Ti(s)",-1.63,2,47.9,87.6)
halfrxn[44]=new redox("V3+(aq)","V2+(aq)",-.255,1,50.94,50.94)
halfrxn[45]=new redox("In3+(aq)","In(s)",-.338,3,114.8,114.8)
halfrxn[46]=new redox("Rb+(aq)","Rb(s)",-2.924,1,85.5,85.5)
function startit(){
clear()
totl++
document.forms[0].total.value=totl
//first get current and time
times[1]=new Array(number(250*Math.random()*100,3,3),"seconds")
times[2]=new Array(number(times[1][0]/60,3,3),"minutes")
times[3]=new Array(number(times[1][0]/3600,3,3),"hours")
//choose the time measure
thetime=Math.ceil(3*Math.random())
thetime=3
if(thetime==2)times[1][0]=number(times[2][0]*60,3,3);
if(thetime==3)times[1][0]=number(times[3][0]*3600,3,3);
var current=0
while(current<5)current=number(100*Math.random(),3,3)
faradays=number(times[1][0]*current/9.65e4,3,3)
//then get reactions
elems=new Array()
var g=Math.ceil(46*Math.random())
elems[1]=halfrxn[g]["first"]
elems[3]=halfrxn[g]["second"]
h=g
while(h==g)h=Math.ceil(46*Math.random());
elems[2]=halfrxn[h]["second"]
elems[4]=halfrxn[h]["first"]
//calculate moles and grams of all materials
moles=new Array()
mass=new Array()
moles[1]=moles[3]=number(faradays/halfrxn[g].num,3,3)
mass[1]=number(moles[1]*halfrxn[g].m1,3,3)
mass[3]=number(moles[3]*halfrxn[g].m2,3,3)
moles[2]=moles[4]=number(faradays/halfrxn[h].num,3,3)
mass[2]=number(moles[2]*halfrxn[h].m2,3,3)
mass[4]=number(moles[4]*halfrxn[h].m1,3,3)
dfs=new Array(0,halfrxn[g].num,halfrxn[h].num,halfrxn[g].num,halfrxn[h].num)
gfws=new Array(0,halfrxn[g].m1,halfrxn[h].m2,halfrxn[g].m2,halfrxn[h].m1)
//get the voltage
volt=halfrxn[g].pot-halfrxn[h].pot
volt=Math.round(100*volt)/100
//load the question
//finish the answer
var m=Math.ceil(2*Math.random())
m==1?welect="anode":welect="cathode";
volt<0.0?vlt=1:vlt=2;
prodcon=Math.floor(2*Math.random())
opt=""+vlt+m
if(opt==11)prodcon==0?anskey=4:anskey=2;
if(opt==12)prodcon==0?anskey=3:anskey=1;
if(opt==21)prodcon==0?anskey=1:anskey=3;
if(opt==22)prodcon==0?anskey=2:anskey=4;
//decide on amount in moles or grams
Math.random()<.5?qunit="grams":qunit="moles";
qunit=="grams"?ans=mass[anskey]:ans=moles[anskey];
buildquest(elems,welect,current,qunit,thetime)
buildanswer(volt,elems,welect,current,qunit,thetime)
}
function buildquest(elems,welect,current,qunit,thetime){
rxn=elems[1]+"+"+elems[2]+"<=>"+elems[3]+"+"+elems[4]+" "
thequest=quest.p1+qunit+quest.p2+options[prodcon]+quest.p3+welect+quest.p4+current+quest.p5+times[thetime][0]+times[thetime][1]+"?
"+rxn
showquest(thequest)
}
function buildanswer(volt,elems,welect,current,qunit,thetime){
volt>0.0?dir="right to left":dir="left to right";
theanswer=""
theanswer+=ansphrase.p1+volt+ansphrase.p2+dir+ansphrase.p3+options[prodcon]+ansphrase.p4+welect+ansphrase.p5+elems[anskey]+ansphrase.p6
if(thetime==1)theequation=current+"*"+times[thetime][0]+"="+number((current*times[thetime][0]),4,3);
else theequation=times[thetime][0]+times[thetime][1]+"=>"+times[1][0]+"secs "+current+"*"+times[1][0]+"="+number((current*times[1][0]),3,3);
theanswer+=(theequation+"couls"+ansphrase.p7+number(faradays,3,3)+" Faradays")
theanswer+=(ansphrase.p8+number(faradays,4,3)+"/"+dfs[anskey]+"="+number(moles[anskey],3,3)+"moles")
if(qunit=="grams")theanswer+=(ansphrase.p9+number(moles[anskey],3,3)+"*"+gfws[anskey]+"="+number(mass[anskey],3,3)+"grams");
//showanswer(theanswer)
}
function answer(theans){
if(tried==1)alert("You've done this one. Get a new problem!")
else{
if(tried==2){totl++;document.forms[0].total.value=totl}
attempts++
if(theans>.95*ans & theans<1.05*ans){
document.forms[0].results.value="Correct"
corrt++
document.forms[0].correct.value=corrt
tried=1
}
else{
document.forms[0].results.value="Incorrect"
tried=2
}
}
}
function constants(){
var cont=window.open("","cont","toolbar=yes,scrollbars=yes,width=300,height=300")
cont.document.writeln ("");
cont.document.writeln ("Ionization Constants");
cont.document.writeln ("");
cont.document.writeln ("Potentials for abbreviated half reactions