Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-5470-145
+91 7353221155
Use Coupon: CART20 and get 20% off on all online Study Material
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
OTP to be sent to Change
Que. 1
The milli moles of Borax (Na2B4O7.10H2O) are required to neutralize 25 mL each of 0.2 M H2SO4 and H3PO3 respectively are ??
que 2
An ore contains 2.5% of the mineral argentite, Ag2S, by mass. How many grams of this ore would have to be processed in order to obtain 0.675g of pure solid silver, Ag? Que 3 in a titration, 60 mL of Phosphoric acid (H3PO4) completely neutralizes 750 mL of Sodium carbonate solution containing 3.18 gm of Na2CO3 in one litre of solution. Thus the molarity of Phosphoric acid is??
An ore contains 2.5% of the mineral argentite, Ag2S, by mass. How many grams of this ore would have to be processed in order to obtain 0.675g of pure solid silver, Ag?
Que 3
in a titration, 60 mL of Phosphoric acid (H3PO4) completely neutralizes 750 mL of Sodium carbonate solution containing 3.18 gm of Na2CO3 in one litre of solution. Thus the molarity of Phosphoric acid is??
in a titration, 60 mL of Phosphoric acid (H3PO4) completely neutralizes 750 mL of Sodium carbonate solution containing 3.18 gm of Na2CO3
in one litre of solution. Thus the molarity of Phosphoric acid is??
Dear Aman,
1)calculate milliequivalents of h3po2 by multiplying volume and normalityNo of milliequivalents = 100 * 0.2 = 20 milllieqsmillieqs of mg(oh)2 is 80 * 0.2 = 16millieqsso 4 millieqs are left for nuetralizationthus we require 4 millieqs of kohso 4 = vol * normality so 4 = volume * 0.25 volume = 16ml2)in ques 2 calculate the milli moles of h2so4 by multiplying molarity and volume ( in ml)similarly for h3po3then apply stoichiometry to the eqaution Na2B4O7 + 2HCl + 5H2O --> 2NaCl + 4H3BO3millimoles of hcl = 25*0.2 = 5 millimolesacc to equation 1mole of borax react with 2 moles of hclso 2.5 moles of borax react with 5 moles of hclsimilarly for h3po33)let the mass of ore be xthen 2.5 * x /100 = molecular wt of ag2s = 248so x = 9920so 9920 gram of ore yields 216 grams of silver ( ag2)so 31 grams of ore with 0.675 gram of ag
Best Of luck
Plz Approve the answer...!!!!
Cracking IIT just got more exciting,It’s not just all about getting assistance from IITians, alongside Target Achievement and Rewards play an important role. ASKIITIANS has it all for you, wherein you get assistance only from IITians for your preparation and winexciting gifts by answering queries in the discussion forums. Reward points 5 + 15 for all those who upload their pic and download the ASKIITIANS Toolbar, just a simple click here to download the toolbar….So start the brain storming…. become a leader with Elite Expert League ASKIITIANS
Thanks
Aman Bansal
Askiitian Expert
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Win Gift vouchers upto Rs 500/-
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !