Chemistry Ans password page

In a tabular formBurette Reading|1st reading|2nd reading|3rd reading
Final |15.25|0.00|45.79|
Volume of acid used |15.25|15.28|15.26

Average volume of acid used = 15.25 + 15.26/2
= 15.255cm³

Given: Mass of conc of A = 5g/500cm³ = 5g/0.5dm³
Ca = 10g/dm³

A is HNO3
Therefore; Molar mass = 1+14+(16×3)
= 15+48

Molarity of A = gram conc/molar mass
Ca = 10/63 = 0.1587mol/dm³

Using CaVa/CbVb = nA/nB
With reacting equation:
HNO3 +NaOH–>NaNO3 + H2O
nA = 1, nB = 1
0.1587×15.26/Cb×25.00 = 1/1
25Cb = 0.1587×15.26
CB = 0.1587×15.26/25
CB = 0.09687mol/dm³

B is NaOH
Molar mass = 23+16+1
Conc of B in g/dm³ = molarity×molar mass

No of moles present in 250cm³ of NaOH is
= molar conc. × volume
= 0.09687 × 250/1000
= 0.0242 moles

Mole ratio of NaOH and NaNO3 is 1:1
No of moles of NaNO3 which reacted is 0.0242
Mass of NaNO3 formed = molar mass × no of moles
= 85 × 0.0242


C + burning splint

Sample C bursts into flame
It burns with non-smoking blue flame, without soot.
Colourless gas that turns wet with blue litmus paper faint red and turns lime water milky is present

C is volatile and flammable. The gas is CO2 from combustion of a saturated organic compound.

C + distilled water + Shake

Clear or colourless solution is observed

C is miscible with water

C + Acidified K2Cr2O7

Orange color of K2Cr2O7 Solution turns pale green and eventually pale blue on cooling

C is a reducing agent

D + C
+ shake

D dissolves slowly in C and produces reddish brown solution
Reddish brown solution turns yellow precipitate. The precipitate has an antiseptic odour

D is soluble In organic solvents

Ethanol, ethanal or a secondary alkanol is present


Zinctrioxonitrate (v) – Zn(NO3)2

2Zn(NO3)2(g) –> 2ZnO(s) + 4NO2(g) + O2(g)

The residue when it has yellow colour which will turn white on cooling

Given; M1 = 1.0mol/dm³
V1 = ?
M2 = 0.2mol/dm³
V2 = 250cm³
Using M1V1 = M2V2
1 × V1 = 0.2×250
V1 = 50cm³

Procedure: Measure out 50cm³ of the stock solution, dilute it to 0.2mol/dm³ by adding 200cm³ of water.

Al(SO4)3 will turn blue litmus paper red



  1. A lot of thanks for all your efforts on this site. Gloria loves engaging in investigation and it’s easy to understand why. Almost all know all concerning the dynamic means you give helpful items on the web blog and as well encourage contribution from others on that concern plus our daughter is always discovering a lot. Have fun with the remaining portion of the new year. You’re the one conducting a good job.

  2. I wanted to put you the tiny remark to be able to say thanks a lot over again on the pleasing strategies you have provided in this case. It was really shockingly open-handed with you to make publicly precisely what many of us would’ve offered for an ebook to get some money for themselves, notably now that you might have tried it in case you desired. These smart ideas in addition served to be the good way to know that other people online have the identical interest really like my personal own to learn more and more related to this matter. I am sure there are numerous more pleasant periods in the future for many who read carefully your site.

  3. I am just writing to make you understand what a perfect experience my wife’s girl obtained using your webblog. She noticed so many pieces, which included what it is like to possess an excellent helping spirit to let others with no trouble learn about specific specialized things. You truly surpassed readers’ expected results. Thank you for providing these priceless, trusted, informative as well as fun tips about this topic to Lizeth.

  4. My wife and i were very thankful when Raymond managed to round up his survey while using the precious recommendations he was given while using the weblog. It is now and again perplexing to simply possibly be releasing tips and hints which usually the others might have been trying to sell. We really take into account we now have you to thank for this. Those illustrations you made, the straightforward website navigation, the relationships your site make it possible to promote – it is mostly unbelievable, and it is making our son in addition to us understand this topic is satisfying, which is certainly very vital. Thanks for the whole thing!

  5. Thanks for the useful information on credit repair on your web-site. The thing I would offer as advice to people will be to give up a mentality they will buy at this moment and pay back later. As being a society most people tend to repeat this for many factors. This includes family vacations, furniture, plus items we really want to have. However, you must separate a person’s wants from the needs. When you’re working to fix your credit score you really have to make some trade-offs. For example you possibly can shop online to economize or you can click on second hand suppliers instead of highly-priced department stores to get clothing.

  6. Plus, there’s a built-in social sharing option. Commenters can check a box to also post on Facebook, which allows them to quickly share your post to their Facebook audience while commenting.
    Facebook Comments are great for blogs where people won’t mind being publicly linked to their comments. On the other hand, people may be less likely to comment with their photo and profile link on blogs that cover more personal topics.

  7. This comment system requires comment authors to create an account with Disqus via email or their Facebook, Twitter or Google+ profiles. Once someone creates an account, they can use it on any website with the Disqus comment system.
    Whenever someone leaves a comment using Disqus, they will get notified via email each time the blog post gets a new comment, when someone likes their comment and when they get a direct reply from someone. This is a great reminder for them to return to the discussion and your website. Disqus users can also tag specific people in a comment.

  8. Plus, if someone wants to follow a conversation, they can subscribe to the comments of a blog post with or without commenting. Visitors can also share a particular discussion or the post on Twitter and Facebook, as well as flag comments they feel are inappropriate to help moderators find and remove them.
    Business bloggers will love the advanced capabilities Disqus has to offer. Enable Disqus to publish comments, hold them all for moderation or allow only those with verified emails to be published. Set up additional moderators to login and moderate comments. Also, get analytics for all of your comments, information about specific commenters and much more.

  9. At some point, Frazell entered the room, gave her a drink and said, “This is between us. Don’t say I never do anything for you,” according to the warrant. She drank a little of the Whiteclaw

  10. uch as increasing access to care through telehealth. These actions are important. However, few experts have provided recommendations for how everyday citizens can flatten the depression curve by reducing stigma.

  11. In most cases, depression is the result of a combination of biological, environmental and psychological circumstances, though just 8% of videos showed messaging consistent with this understanding.

  12. After looking into a few of the blog posts on your web page, I really like your way of blogging. I saved as a favorite it to my bookmark webpage list and will be checking back soon. Please visit my website too and let me know how you feel.

  13. Hello there! This post could not be written any better!
    Reading this post reminds me of my good old room mate! He always kept talking about this.
    I will forward this article to him. Fairly certain he will have a good
    read. Thanks for sharing!

    Also visit my blog … SEO Philippines

  14. Wow, awesome weblog layout! How long have you ever been blogging for?
    you made running a blog look easy. The overall glance of your website is great, as well
    as the content!

    Here is my website; SEO

Leave a Reply

Your email address will not be published.