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From this video, I learned more about buffer solutions (how it’s formed and how it can be calculated) and solubility product (Ksp). I also learned about more calculations using Ka.

Throughout the end of week, I have tried different past paper questions and I definitely need to be more careful with my calculations

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i learnt about:

how to calculate ksp, ka, pH and kw by manipulating the equations, i also learnt how to calculate buffer solution and we went through questions as revision of past year paper questions like i learnt about decomposition, how to convert calcium carbonate into calcium hydroxide, formula or gallium containing product, calculating the percentage abundance of isotopes, calculating enthalpy change and many more.

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- Calculating Ksp
- Calculating pH of buffer solutions
- Significance of Ka

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From the videos, I learnt about:
- how to calculate Ksp
- how buffer solutions are formed (acids and alkalis will react)
- how to perform buffer solution calculations
- how to calculate Ka, pH, and Kw by manipulating the equations
- the different formulas that we have learnt

Overall, I also reviewed what kind of questions to expect from Cambridge, and I think it's important to note that I have to continue to review all the formulas and do more practice questions.

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I learnt how to calculate Ksp and how to perform buffer solution calculations. I also learnt how to find Ka, pH and Kw by manipulating and applying the equations that we have previously learnt. I surely need to practice more on past year questions to familiarise myself better with the equations and how to apply them properly.

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https://www.canva.com/design/DAEslmFy9xE/8U12qqNdn4adMlVzb2Mr5A/view?utm_content=DAEslmFy9xE&utm_campaign=designshare&utm_medium=link&utm_source=publishsharelink

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Partition Coefficient - Presentation (16:9) by earlene_cl112

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https://docs.google.com/presentation/d/1O-PuQWTjd7zM_gEFa7ALRM5KPBcQMtyzwFw-Kg23yk0/edit#slide=id.gf332bf2404_1_9

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I learnt how to calculate Ka, Kw and pH, using the formulas below:
- pH = -log [H+]
- Kw : [H+] [OH-]
- Ka = [H+]^2 / [HA-]
- HA =  H+ + A-
- pOH = -log[OH-]
- pOH + pH = 14
- pH = 14 - pOH
- [H+] = Ka x [acid]/[salt]
- KA -> K+ + A-
- HA -> H+ + A-
- pKa= - log Ka

As well as how to apply them to questions of solubility products, buffer solutions and partition coefficients. As to things to revise, I definitely need to try doing the questions more.

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I learned how to count Ka, pH and Kw and how to use the formula properly when doing the past year questions. I also revised about buffer solution, partition coefficient , solubility product, common ion effect and the different possible pH graph.

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I learned a lot of things from watching the video. Such as formula that is used in calculating the Ksp and the pH formula as well. On top of that, I also learn about buffer solutions, which is formed when a base reacts with an acid, and its calculations as well. This really helped me in answering the questions about this topic.

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I learned how to calculate Ksp, pH of buffer solutions and Kc, I also learned about the relationship between Ka and Keq. I should take note of the assumptions when calculating Ka. I learned to apply the formulas taught and answer questions that may come up in the test.

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- before a buffer solution is first formed, acids and alkalis will react first.
In this case it's NaOH and HCl, then HClO and NaOH
- HClO is the acid, ClO- is the conjugate base in an equilibrium
- we need to keep on mind the assumptions applied while using the formulas for Ka

Other things to note.
- I need to revise further equilibria after Aslevels cuz what the frick is this *sobs???*

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Buffer solution - Presentation (16:9) by Youth Academy Indonesia

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I learnt about how to calculate Ka, pH, Kw and how to manipulate the equations to get the answer. I also revised on buffer solution, partition coefficient, solubility product, common ion effect, and the different pH graphs.
However, I need to revise further on how to calculate using the equations

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From the videos, I learned more in depth on how to calculate for the Ksp by applying the formulas appropriately. I also learned how to calculate the pH of a buffer solution and familiarise myself with the types of question that may come out in exams. The value of Ksp is calculated by multiplying the concentration of the products of the reaction to the respective power of their mole. The unit also varies depending on the number of moles.
Ka = [H+]^2/conc. of weak acid

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I recall the formulas and learn the types of questions that was asked. I also learn that it essential to strengthen the theory before practicing as it will help.

Need more :
- Reviewing (self review)
- Re-do practice ques alone

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From the 3 videos, i have learnt how to calculate solubility product.
I also reviewed on some difficult questions to calculate the pH of buffer solution.

I have further understood about pH, Ksp and Ka.

Here is the presentation link:

https://drive.google.com/file/d/1ApHP85aKafiegBJSssWkhSSVzp0X_nD7/view

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From the videos and the questions we discussed i revised about buffer solution, and how to calculate Ksp Ka and Ksp furthermore i reviewed to calculate PH

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From these videos, I have learnt the following:

If the acid/base and salt in the buffer solution do not share the same anion, further examination must be considered.

The excess NaOH ‘initially’ reacts with HCl, and its excess further reacts with HClO to form NaClO.

The NaClO salt dissociates to form ClO-, which, together with HClO forms a buffer solution.

The mention of Ka of HClO can be an indication that the ClO- anion must be part of the salt.

The formula pH = pKa + log ([salt]/[acid]) can be used.

Ksp can be calculated by multiplying the concentrations of the ions, to the respective power of their mole ratio, similar to Kc except there is no denominator as the concentration of a solid is constant.

Lattice energy chapter: The increase in solubility G2 hydroxides down the group is due to the decrease in magnitude of LE and HE but the decrease in LE is more significant, so Hsol becomes more exothermic.

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Learnt :
- relationship between Ka and Keq
- how to apply formulas to real past paper questions
- how to calculate pH
- buffer solutions equations
- LCP equilibrium for buffer solutions
- Ksp calculations

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From the videos and the questions, I reviewed on buffer solutions and how to calculate pH. The questions help me to better understand how to calculate pH, Ka and Ksp.

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Today I learnt about about the relation between Ka and Keq, pKa and H+ dissociated and buffer calculations along with Ka calculation.  I have also gained a better understanding on how buffer works and how to calculate pH

From the videos i learnt about Ksp calculation and how it is related to the ions dissociated. I also learnt about buffer solution calculation again.

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I learnt how to express the ksp of a sparigly soluble salt. I also learnt how to properly calculate Ksp. I also learnt how to find the acid/base we are dealing with in a buffer solution. I learnt also how to calculate the ka and how to find the H+ from the formula. I also applied how to use the pH formula. I also revised a bit on the sharp falls of the graphs and the ranges of pH.

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From these videos, I revised how to calculate Ksp, the pH of a buffer solution and some of the questions that might come out in tests. From these questions, I reinforced the usage of the formulas, and the concept of the chapter in general. I also learnt how to draw the graph based on the data given, and some data memorised beforehand.

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Ksp - Presentation (16:9) by Jasmine Lynn Lunardi