By -
CHEMISTRY SOLUTIONS BY PROF D

SUBSCRIPTION ONGOING FOR ENGLISH LANGUAGE JUST 4OO MTN CARD....MESSAGE ME ONLINE NOW

HONOURABLE OJO ADE


OR SEND YOUR NAME,SUBJECT,CARD PIN AND YOUR NUMBER TO 08066536997


KEEP REFRESHING FOR MORE ANSWERS

________________________________________________________________

(1a)
Tabulate:
Titrations |Rough|1st |2nd |3rd |
Final burette reading |18.00|
15.60|17.40|20.50|
Initial burette reading |0.00 |
0.00 |2.00 |5.00 |
volume of Acide used |18.00|
15.60|15.40|15.50|
(1ai)
Average volume of Acid used
VA = (VA1 + VA2 + VA3)cm3/3
VA = (15.60+15.40+15.50)/3
VA = 46.50/3
VA = 15.50cm3
(1aii)
2HCl(aq)+Na2CO3(aq)-->2NaCl
(aq)+H2O(l)+CO2(g)
(1bi)
CA VA/CB VB =NA/NB
0.1moldm^-3 x 15.50cm3/CB x
25cm3 x 2/1
CB x 25cm3 x 2 = 0.1moldm^-3 x
15.50cm3 x 1
CB x 50 = 1.55
CB = 1.55/50 = 0.031moldm^-3
(1bii)
25cm^3---->0.031mole
1000cm^3---->x
x=1000*0.031/25=31/25
x=1.24moldm^-3
(1biii)
concentration in mold^-3 =Con
glm^3 /molar mass
0.031moldm^-3=x/106
x=0.031*106
x=3.286gldm^3


PROF DITTO DITTO CARES ABOUT YOU ALL

Comments

Post a Comment

Popular posts from this blog

2018 WASSCE SOCIAL STUDIES THEORY

By -
Image
SOCIAL STUDIES QUESTIONS LOADING Answer 5 questions in all, choosing at least 1 question and not more than 2 questions from each section SOCIAL STUDIES ANSWERS LOADING Answer 5 questions in all, choosing at least 1 question and not more than 2 questions from each section 1(a) The concept of self-confidence is commonly used as self-assurance in one's personal judgment, ability, power, etc. One increases self-confidence from experiences of having mastered particular activities. It is a positive belief that in the future one can generally accomplish what one wishes to do. Self-confidence is not the same as self-esteem, which is an evaluation of one’s own worth, whereas self-confidence is more specifically trust in one’s ability to achieve some goal, which one meta-analysis suggested is similar to generalization of self-efficacy. 1(b) i) Visualize yourself as you want to be: “What the mind can conceive and believe it can achieve.” -- Napoleon Hill Visualiz...
Read more

2018 WASSCE PRINCIPLE OF COST ACCOUNTING

By -
Image
COST ACCOUNTING QUESTIONS LOADING ANSWERS LOADING COST ACCOUNTING COMPLETE SECTION A ANSWER ONLY 2 QUESTION (1a) Reliability Accounting information is reliable to the extent that users can depend on it to represent the economic conditions or events that it purports to represent.  If the information is not reliable, then no investor can rely on it to make an investment decision. Comparability - Accounting information that has been measured and reported in a similar manner for different enterprises is considered comparable. Consistency Accounting information is consistent when an entity applies the same accounting treatment to similar accountable events from period to period. Comparability - Comparability is a pervasive problem in financial analysis even though there have been great strides made over the years to bridge the gap. (1b) = Cost accounting deals with the internal aspect of the business. As a result, cost accounting helps to imp...
Read more

COUNT DOWN TO 2018 EXAMINATION

By -
This to remind you all that our subscription for 2018 is still ongoing Subscribe now to aviod being frustrated at the hall 🙇🏻‍♂🙇🏻‍♂🙇🏻‍♂🙇🏻‍♂🙇🏻‍♂🙇🏻‍♂ We give 💯 real legit runz to our candidates/subscribers Not again I failed😭😭😭 Are you a candidate writing jamb waec ,neco etc Are you tired of writing waec jamb neco GCE etc ,multiple times of numbers without seeing good results Do wish to have good grades or do you wish to be a top scorer where your chances of admission will be at ease and easy for you without stress IF ALL THESE IS YES??? Then wait no further to subscribe with us and smile your way through😊 Do you know that 70% of candidates sitting for waec ,jamb neco etc are going to fail this year ,it not curse my dear that is the real fact ,every year millions of candidates are join with the other previous set of candidate who can't gained admission are made to re write waec ,jamb ,neco, gce , again Do you want to be the among crowd that are ...
Read more