Two Anions from the Given Mixture of Salt | Salt Analysis | 11th & 12th Chemistry Practical

Today we are going to identify two anions from the given salt mixture. Two anions are essentially negatively charged. How are they negatively charged? From the numerous initial tests, we are beginning to understand that Two anions can be present in multiple tests, such as the dry test and the AgNO3 test, where we obtained PGT. From this, we learn that SO4 and CO3 are present. Because in the 12th-grade chemistry practical, we have to identify two anions. When we were getting to know that CO3 and SO4 could be present, Then why not perform a CT to determine whether CO3 and SO4 are present? If you perform a CT, you will find out whether CO3 and SO4 are present. The sulfate test is very easy. You can also perform an indivisible test to determine whether SO₄ is present. The sulfate test is very easy. What do you have to do in an indivisible test? You have to take your mixture. What do you have to take? Give me that mixture. And pack it up. You have to take your mixture. And you must add diluted ACL. What else do you need to add? Dilute ACL. And you have to boil it a bit. So I have added diluted ACL. From the effervescence, we understand that CO₃ is present. I am showing you SO4. I have added diluted ACL. After diluting the ACL, I will boil it. I will add diluted BaCl₂. If I get white PPT, then my SO4 will be present. SO4 will be present. Now I will boil it. After boiling, I will add BaCl₂. I will add BACL. After adding BACL, the entire solution becomes milky. That is white precipitation. What is white precipitation? This white precipitate confirms the presence of SO₄²⁻. What is present? SO4 is present. One more thing. This white precipitate should not dissolve in dilute HCl. It should not dissolve in dilute ACL. Can you see? White precipitation is like this. It is not dissolving in dilute ACL. That is why SO4 is present. Now I have to do a CT. What do I have to do? CT is very easy. You can perform SO4 CT. CT means confirmatory test. What is it? For CT, OS is used. What is used for CT? OS I will tell you how to perform SO4 on CT. OS means salt plus water. I have added salt and water to make OS. Now I will add lead acid. What will I add? Lead-acid. If I obtain white precipitation, then my sulfate (SO₄²⁻) is present. I will add it. You can see that precipitation has begun. White color precipitation confirms that The SO4 group is present. Which group is present? The SO4 group is present. You can also add BACL2. You will also receive white precipitation. You can also test BACL2. You can perform a maximum of 2 CTs. SO4 is confirmed. When I was doing clearing test I found out that I can also get CO3. In the 12th, We have to identify two anions. Let's check CO3. The CD of CO3 is very easy. I will tell you that You have to take OS Add 2-3 drops of phenolphthalein. Actually, if your salt contains CO₃, then if you add coal acid, Then the efflorescence is very high. And from that we come to know that Our salt contains CO3. Everyone knows one thing. Let's check the CD. You have to take the OS from the CD. After that, We have to add the phenolphthalein indicator. What will we add? After the phenolphthalein indicator, if you get a pink coloration, and this pink coloring indicates that CO3 is present. Carbonate is present. I can also tell you CD of CO3 which you can use easily. I was telling you That efflorescence is present. This is also present in CD. Like you took OS and added phenolphthalein If efflorescence occurs, Then CO3 is present. This is also present in CD. I will add and show you. Can you see efflorescence? What a powerful efflorescence of CO2. This efflorescence indicates that CO3²⁻ is present. If you want, You can learn another CD, medium nitrate. OS plus medium nitrate has white precipitation. CO3²⁻ will be present. In this way, You can perform anion salt analysis. You can get 6 marks for this. Anion salt analysis It is very easy. You just have to find out CD. Understood.