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Eighth-grade students start getting acquainted with Chemistry with the most basic knowledge such as valence, periodic table of chemical elements, atomic mass, and even solubility table of chemical substances. When students grasp these basic knowledge, they can study Chemistry well. If you don't remember the solubility table, refer to the following article.
Effective ways to memorize the solubility table of some substances in water
I. Solubility Table of Chemical Substances
* Table 1
* Table 2
II. Things to know about the solubility table
According to the chemistry book for grade 9, solubility is understood as the amount of substance completely dissolved in 100 grams of solvent (usually water) to form a saturated solution at a certain temperature.
Temperature, solvent, etc. are considered factors affecting the solubility of substances. For example, if you put sugar in water at a high temperature or under agitation, it will dissolve faster.
This solubility table is a tool to help you know the solubility, evaporation rate, precipitation, thereby making your exercises easier.
III. Quick memorization tips for the solubility table
During tests, exams, or laboratory experiments, you will be allowed to bring a solubility table for reference. However, memorizing this table will help you be more proactive in your studies, making research easier and faster.
Memorizing this knowledge is considered quite difficult and requires a lot of time. Therefore, we will share with you ways to memorize the solubility table through poems or effective summarization methods that will help you understand, memorize, and remember longer.
Solubility of salts and hydroxides
1. Summarize the solubility table
* Solubility of salts
* Solubility of acids in water
Only H2SiO3 is insoluble, the rest of the acids are soluble and evaporate easily.
* Chemical solubility of bases
All substances are insoluble except:
- Alkali metal bases like Li, K, Na are soluble
- Alkaline earth metal bases like Ba, Ca are slightly soluble
- Compounds of NH4OH are soluble
2. Solubility of salts
Salt type always dissolves
Such as Acetate salt (CH3COO)
And Nitrate salt (NO3)
Regardless of any metal
Such salts always dissolve
Such as Chloride, Sulfate (Cl; SO4)
Except silver, lead chloride (AgCl; PbCl)
Barium, lead sulfate (BaCl2; PbCl2)
Insoluble salts include
Carbonate; Phosphate
Sulfide and Sulfite
Except Alkali, Ammonium......
With this poem, you can see that the solubility of chloride salts and the solubility table of phosphate salts are always soluble.
3. Poem on the solubility of chemical substances
Bases, those insoluble friends: Copper, aluminum, chromium, zinc, manganese, iron, lead.
Calcium is sparingly soluble
Magnesium also doesn't ionize easily
All metal I salts dissolve
As well as Nitrate and the 'organic lady'
To remember, you have to make a poem!
Let's do an experiment now to see,
Group I Metals, we already know,
Other metals we 'probe' to find
Phosphates in water 'stand still' (Except metal I)
Sulfates some 'stubbornly stubborn':
Barium, lead with S - r
Slightly soluble includes silver, 'naive lad' Calcium,
For chloride salts, Silver precipitates, lead tries to dissolve (Similar to bromide, iodide salts)
Remembering other salts is easy:
Sulfate doesn't dissolve at all! (Except metal I)
What about sulfate? (Similar to carbonate salts)
Aluminum doesn't exist, all dissolve
Except copper, tin, silver, manganese,
Mercury, zinc, iron do not dissolve along with lead
By now, you've had enough test,
Wishing you success in all your endeavors!
The study tips above are supplementary methods to help you in your studies. However, you still need to spend more time, persevere in studying, and do more exercises to remember better.
With the solubility table of chemical substances updated by Mytour above, students will reinforce their basic foundation knowledge, making chemistry exercises and studying easier, thereby becoming more interested in this subject.
