Plese help with Chem homework!! A ALEKS - Learn - Ramisha x C Chegg Study Guided
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Plese help with Chem homework!!
A ALEKS - Learn - Ramisha x C Chegg Study Guided Sox e-ox & CI Secure | https//www-awhalekscom/alekscgi/xl islexe/u-lgNskr78P3jH1BIKFdvdkR4QDFufbLE9JHQOYSYenz3sV-BuQCY9DOm-12dozowtt01 .. Q OD U Apps A Facebook A University Square T Job Board | Depa artme at Under 25 Fridays So Talk Thru Drugstore O Ful Face IN DEPTH N woc HCC Eagle Online: Loo Ombre Sunset Smoke O STOICHIOMETRY Calculating molarity using solute moles OOOOD A chemist prepares a solution of nickel(II) chloride (NIC) by measuring out 19 – 10 Amol of nickel(ID) chloride into a 350. mL volumetric flask and filing the flask to the mark with water | Calculate the concentration in molIL of the chemist's nickel(II) chloride solution. Be sure your answer has the correct number of significant digits. mot Tena Explanation Check 9:16 PM Type here to search A House p) 10/24/2017Explanation / Answer
1) Molarity(M) = n/V
n = no of mol of solute = 1.9*10^2 umol
= 1.9*10^2*10^-6 mol
= 1.9*10^-4 mol
V = volume of solution = 350 ml = 0.35 L
M = n/V
= (1.9*10^-4)/0.35
= 5.43*10^-4 M
2) pH = -log[H3O+]
a) pH = -log(8*10^-7) = 6.1
b) [H3O+] = 10^-pH
= 10^-9.156
= 6.98*10^-10 M
c) pH = -log(3.17*10^-6) = 5.5
3) Zn^2+ , Zn ox.state = +2
OH^- ,
X+(+1) = -1
O-ox.state = X = -2
CHCl3 ,
X+(+1)+(-3)*3 = 0
c-ox.state =X = +4
co3^2- , C-ox.state = +2