O Level Chemistry – Physical & Chemical Properties of ACIDs


Today, we are going to look into the properties of Acids. In Chemistry learning, whenever we talk about properties, we will always look into both the Physical & Chemical Properties of the substances.

PHYSICAL PROPERTIES OF ACIDS:
1. Acids have a SOUR taste
2. All acids are SOLUBLE in water
3. Acids solutions turn BLUE litmus paper RED
4. Acid solutions have a pH values < 7
5. Most acid solutions are CORROSIVE
6. All dilute acids CONDUCT ELECTRICITY due to the presence MOBILE IONS in solution

So far so good on the Physical Properties of Acids, now let’s look on the Chemical Properties then..

CHEMICAL PROPERTIES OF ACIDS:
1. React with reactive metals (above H in Reactivity Series) to form Salt & Hydrogen Gas
2. React with Metal Carbonates to form Salt, Carbon Dioxide & Water
3. React with Bases/Alkali to form Salt & Water (Neutralistion Reaction)

Is this GOOD or GOOD??? Let us know see how much you have learnt, by checking out some exam-based questions.

Quick Check 1:
Name the products of the following reactions:
(i) zinc + hydrochloric acid
(ii) iron + sulphuric acid

Quick Check 2:
Which property does hydrochloric acid have?
A. It liberates ammonia from ammonium salts
B. It reacts with any base to give a salt
C. It reacts with any metal to give a hydrogen
D. It turns red litmus paper blue

Quick Check 3:
Which substance is not used to prepare zinc chloride by reaction with hydrochloric acid?
A. zinc carbonate
B. zinc hydroxide
C. zinc nitrate
D. zinc oxide

PS: Do leave your suggested answers in the “Comments Section” directly below this post.

PPS: This post belongs to a series of blogposts that is associated with Secrets of “Acids, Bases & Salts and Qualitative Analysis revelaed”

Related Articles:

Many people talked about teaching Chemistry, I simply LOVE it. I am a passionate Chemistry Coach based in Singapore, Southeast-Asia and aspire to be one of the most dynamic, powerful and humorous speakers in Asia. My 16+ years of coaching experience has equipped me to understand the true reasons why students are not able to perform well in Chemistry, and allow me to structure my teaching methodology to cater to different levels of learners. If you have found this post useful, please share it with your friends. I would really appreciate it! Sean Chua

30 Responses to O Level Chemistry – Physical & Chemical Properties of ACIDs
  1. Natalie Hosein
    September 4, 2008 | 5:17 am

    this site is extremely helpful. it helps me alot with homework i don’t understand.

    Reply

    sean Reply:

    Thanks Natalie for the encouraging words.

    I am glad students like you are benefitting from this Chemistry Blogsite.

    Until maybe next year, where i will start Online Coaching for overseas students, that is what i can help overseas students for the time being.

    For those students based in Singapore, i can do more for them as i am running public Chemistry workshops & intensive revision bootcamps to complement what they have learned in schools, and sometimes to add on something interesting for them, so to make learning Chemistry more fun, more easily.

    Btw, where are you from and which educational system do you follow?

    For Singapore, we subscribe to Cambridge GCE O Levels.

    Rgds
    Sean
    Master Trainer

    Reply

  2. yogi
    October 15, 2008 | 7:23 am

    thank you!!!!!!!!!!! very very helpful :)

    Reply

    sean Reply:

    Hi Yogi,

    I am glad this humble chemistry blogsite is helpful towards ur learning.

    Do check out our recent blogposts.

    See you around participating =)

    To Your Academic Success in Chemistry,
    Sean Chua
    Master Trainer & Author
    WINNERS Education Group

    “Experience Learning with A Difference”

    Reply

  3. Shafia HassaN
    April 22, 2009 | 11:35 pm

    I had forgotten my book at school and had test the next day this website really helped me preparing for that because i got all the related stuff i needed….Thankyew verry much! keep roking

    Reply

    rija Reply:

    shafia are you from pk?

    Reply

    sean Reply:

    Hello Shafia Hassan,

    I am glad this humble chemistry blogsite is helpful towards your mastering of Chemistry.

    Check out other recent blgoposts and do participate in the discussions.

    See you around!

    To Your Academic Success in Chemistry,
    Sean Chua
    Master Trainer & Author
    WINNERS Education Group

    “Experience Learning with A Difference”

    Reply

  4. Rashika
    August 16, 2009 | 1:07 am

    hey… dis site is really helpful. especially 4 students like me, who r really scared of chem.

    Reply

    sean Reply:

    Hi Rashika,

    I am glad you find this chemistry blogsite helpful to you.

    Chemistry is in fact very enjoyable and enriching. But you must be open to accept the concepts behind it.

    Enjoy!

    Reply

  5. talha bin anees
    September 10, 2009 | 4:36 am

    sir can u plz provide me the notes of chem gce o levels ! i am from pakistan! i would be very thankful to u!

    Reply

  6. Lavender
    October 14, 2009 | 7:32 pm

    Hi HI!

    These are my answers, hope you can grade them please!

    Quickcheck 1:
    (i) zinc chloride
    (ii) iron (II)sulfate

    Quickcheck 2:
    B

    Quickcheck 3:
    C

    Reply

    sean Reply:

    Hi Lavender,

    Quickchecks 2 and 3 are correct!

    For quickcheck 1, the name of the salt produced are correct but you forget that there will be hydrogen gas produced also in such reactions.

    Hope you find this useful.

    Reply

  7. soup
    October 16, 2009 | 12:48 am

    i) zinc chloride
    ii) iron (II) sulfate

    2)B

    3)C

    Reply

    sean Reply:

    Hi soup,

    please see my reply to “Lavender”.

    Thanks.

    Reply

  8. Mustafa
    October 21, 2009 | 2:27 pm

    Answrs:

    i) Zinc chloride
    ii) Iron Sulfate

    2) B

    3) D

    Reply

    sean Reply:

    Hi Mustafa,

    please see my reply to “Lavender”.

    Thanks.

    Reply

  9. Mohammed Talha
    December 27, 2009 | 3:59 pm

    There are a few more chemical properties of acids which I would like to be displayed:
    1)Acids are compounds containing hydrogen as one of the elements.
    2)Acids also react with water to give hydronium ions and acid radical.

    Anyway this site is very helpful.
    Thanks a lot.

    Reply

    sean Reply:

    Hi Mohammed Talha,

    Good to see you adding on some other properties.

    For your Point 1 – Do note that NOT all compounds that have hydrogen atoms are Acids.

    Cheers,
    Sean Chua

    Reply

  10. Ehis
    February 9, 2010 | 3:46 pm

    My answers are 1) zinc chloride + hydrogen gas iron11susulphate + hydrogen gas. 2) B 3) c i love this chemistry lessons and i need more of it

    Reply

    sean Reply:

    Hi Ehis,

    Thanks for the encouragement!

    We are improving this chemistry website for Basic Chemistry students to benefit more through self-questioning and participative mode.

    To Your Academic Success in Chemistry,
    Sean Chua
    Master Trainer & Author

    Reply

  11. Varda
    April 4, 2010 | 9:52 pm

    my answers are:
    1-zinchloride+hydrogen and ironsulphate+hydrogen
    2-B OR C–( i think both are correct please help me which one is not correct and why)
    3-C
    Love thos site…it helps a lottt!!

    Reply

    sean Reply:

    Hi Ehis,

    Thanks for the encouragement!

    You can check the answers above (my reply to others).

    To Your Academic Success in Chemistry,
    Sean Chua
    Master Trainer & Author

    Reply

  12. Avish Avneesh
    May 11, 2010 | 1:59 pm

    Very cool site because the notes are simple .

    Reply

  13. Amelia
    January 16, 2011 | 10:34 pm

    This site is really useful . It helps me alot with my hw ^-^

    Reply

  14. Clint
    January 18, 2011 | 4:10 am

    This site made me understood Acids & its properties. Thanks and keep it up.

    Reply

  15. lyn
    March 28, 2011 | 8:38 am

    Hi,

    Can you explain the answer for quickcheck 3?
    Thanks

    Reply

  16. AYUBU CHAULA
    February 27, 2012 | 2:55 pm

    Am very glad havng this chemistry blogsite its very helpful to me as a chemistry teacher

    Reply

  17. Muhammad Lawan kolomi
    April 21, 2012 | 4:08 am

    I am injoying this website even more than my text book, becouse the english are simple to understand.

    Reply

  18. Ojasvi Singla
    June 7, 2012 | 8:01 pm

    This is a nice chemistry blogsite for students. I got answers here to my confusions.
    THANKS A LOT….

    Reply

  19. Eunice
    May 21, 2013 | 5:23 pm

    1. Zinc chloride and hydrogen halide
    Iron sulphate and hydrogen halide
    2. B
    3. D

    Reply

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