What are the different types of JC Chemistry tuition classes available at your centre?

We have 3 modes of learning for students to choose from: weekly physical classes at Bishan; weekly online lessons via Zoom; and on-demand video lessons.

Are you the only Chemistry tutor conducting the classes or do you engage other tutors to do that?

Please be rest assured that I conduct all my classes personally and I do not engage other tutors to teach at my centre.

How well do your students perform after attending your H2 Chemistry tuition classes?

Most of my students showed improvements by at least 3 grades and more than 80% have attained distinction for A Levels. The earlier the students join my classes, the more confident I am in improving their grades.

What is your class size at Bishan?

Usually the class size is around 10 to 12 students. Max class size is 16 pax.

Is there makeup lesson if I miss a class?

Yes makeup lesson is available in the same week subject to availability. If makeup class is not possible, the student can view the recorded video lessons at Google Classroom.

Do you have trial lesson available? How much is it?

Yes we do. Fees for trial lesson are for Bishan class and for Zoom online class.

Does your centre offer O Level chemistry tuition? Do you teach IB / IP chemistry tuition? How about H1 Chemistry?

Chemistry Guru specialises in H2 Chemistry for JC1 and JC2 or IP Year 5 and IP Year 6 students only. Find out all the information about A Level H2 Chemistry and the detailed comparison between H1 and H2 Chemistry. We do not conduct lessons for H1 Chemistry, O Level Chemistry, IB Chemistry or IP Chemistry at IP Year 3 and IP Year 4.

How to use Ksp to Compare Solubility

Let's consider the solubility product (K_sp) expressions of these 2 sparingly soluble salts, AgBr and Ag₂CO₃.

For AgBr, K_sp = [Ag⁺][Br^-]

For Ag₂CO₃, K_sp = [Ag⁺]²[CO₃^2-]

Since K_sp is related to concentration of ions in a saturated solution, can we use K_sp to compare solubility of 2 salts directly?

Let Chemistry Guru, Singapore's esteemed A Level Chemistry tuition centre, guide you through the solubility product (K_sp) and solubility of these 2 salts.

230116 compare Ksp and solubility

Notice Ag₂CO₃ has a slightly higher K_sp but significantly larger solubility.

The reason for the disproportionate difference in K_sp and solubility is due to the mathematical conversion from K_sp to solubility.

For AgBr with 2 ions dissociated, the conversion from K_sp to solubility is by square root.

230116 calculate AgBr solubility

For Ag₂CO₃ with 3 ions dissociated, the conversion from K_sp to solubility is by cube root.

230116 calculate Ag2CO3 solubility

Due to this disproportionate difference, there is a possibility that a salt can have a bigger K_sp but lower solubility as compared to another salt.

230116 compare Ksp and solubility 2

Notice the 2 highlighted salts, AgCl has a bigger K_sp but is less soluble than Ag₂CrO₄.

Hence when comparing solubility of 2 salts that dissociate to give the same number of ions, we can use K_sp to compare solubility directly.

But when the number of ions dissociated is different, we have to calculate the solubility from K_sp to determine which salt is more soluble.

Topic: Solubility Product, Physical Chemistry, A Level Chemistry, Singapore

Back to other previous Physical Chemistry Video Lessons.

Found this A Level Chemistry video useful?

This free chemistry video lesson is brought to you by Chemistry Guru, Singapore's top JC Chemistry tuition centre since 2010.

Please like this video and share it with your friends!

Join my 18,000 subscribers on my YouTube Channel for new A Level Chemistry video lessons every week.

Check out other A Level Chemistry Video Lessons here!

Need an experienced tutor to make Chemistry simpler for you?

Do consider signing up for my JC Chemistry Tuition classes at Bishan or on-demand video lessons!

Menu

Classes

Info

Resources

Videos

How to use Ksp to Compare Solubility