Are yOu a Chemist? (QUIZ)

1. Suatu zat padat dilarutkan dalam air, ternyata larutan zat tersebut dapat menghantarkan arus listrik. Pernyataan yang tepat untuk menerangkan peristiwa tersebut ...

Dalam larutannya zat padat tersebut terurai sempurna menjadi ion-ion

Dalam larutannya zat padat tersebut terurai menjadi atom-atom

Dalam larutannya zat padat tersebut terurai menjadi molekul-molekul

Dalam larutannya zat padat tersebut terurai menjadi bersifat asam

Dalam larutannya zat padat tersebut terurai menjadi bersifat basa

When a solid substance is dissolved in water and the resulting solution is able to conduct electricity, it indicates that the solid substance has completely dissociated into ions. These ions are responsible for carrying the electric current through the solution. Therefore, the correct statement to explain the given situation is "Dalam larutannya zat padat tersebut terurai sempurna menjadi ion-ion" which translates to "In its solution, the solid substance completely dissociates into ions."

Explanation

When a solid substance is dissolved in water and the resulting solution is able to conduct electricity, it indicates that the solid substance has completely dissociated into ions. These ions are responsible for carrying the electric current through the solution. Therefore, the correct statement to explain the given situation is "Dalam larutannya zat padat tersebut terurai sempurna menjadi ion-ion" which translates to "In its solution, the solid substance completely dissociates into ions."

2. Arus listrik dapat mengalir melalui larutan elektrolit karena ...

Arus mengalir dari kutub positif ke kutub negatif

Media yang memungkinkan terjadinya arus listrik

Lampu menyala saat listrik dialirkan

Muncul gelembung gas

Terdapat ion-ion di dalam larutan yang dapat bergerak bebas

Ketika ada ion-ion di dalam larutan yang dapat bergerak bebas, mereka dapat membawa muatan listrik dan mengalirkan arus listrik melalui larutan. Ini terjadi karena ion-ion tersebut dapat berpindah dari kutub positif ke kutub negatif, sehingga arus dapat mengalir melalui larutan elektrolit.

Explanation

Ketika ada ion-ion di dalam larutan yang dapat bergerak bebas, mereka dapat membawa muatan listrik dan mengalirkan arus listrik melalui larutan. Ini terjadi karena ion-ion tersebut dapat berpindah dari kutub positif ke kutub negatif, sehingga arus dapat mengalir melalui larutan elektrolit.

3. Data eksperimen daya hantar listrik beberapa larutan

Larutan	Pengamatan
Larutan	Nyala Lampu	Gelembung Gas
1	Terang	Ada
2	Tidak menyala	Tidak ada
3	Tidak menyala	Ada
4	Tidak menyala	Tidak ada
5	Menyala	Ada

Berdasarkan data di atas yang merupakan larutan non – elektrolit adalah nomor …

1 dan 5

2 dan 3

2 dan 4

1 dan 4

3 dan 5

Based on the observations given, a non-electrolyte solution is one that does not conduct electricity and does not produce gas bubbles when an electric current is passed through it. Looking at the data, we can see that solutions 2 and 4 do not light up the lamp and do not produce gas bubbles. Therefore, solutions 2 and 4 are the non-electrolyte solutions.

Explanation

Based on the observations given, a non-electrolyte solution is one that does not conduct electricity and does not produce gas bubbles when an electric current is passed through it. Looking at the data, we can see that solutions 2 and 4 do not light up the lamp and do not produce gas bubbles. Therefore, solutions 2 and 4 are the non-electrolyte solutions.

4. Di antara larutan dibawah ini :

HBr 1 M
Al(OH⁾₂ 0,2 M
CH₃COOH 0,3 M
NaCl 0,4 M
HCl 0,5 M

yang memiliki daya hantar listrik terbesar adalah...

1

2

3

4

5

The correct answer is 1. The solution with the highest electrical conductivity is HCl 0.5 M. This is because HCl is a strong acid and dissociates completely in water to form H+ and Cl- ions, which are responsible for conducting electricity. The other solutions (HBr, Al(OH)2, CH3COOH, and NaCl) either have weaker acids or are not strong electrolytes, resulting in lower electrical conductivity.

Explanation

The correct answer is 1. The solution with the highest electrical conductivity is HCl 0.5 M. This is because HCl is a strong acid and dissociates completely in water to form H+ and Cl- ions, which are responsible for conducting electricity. The other solutions (HBr, Al(OH)2, CH3COOH, and NaCl) either have weaker acids or are not strong electrolytes, resulting in lower electrical conductivity.

5. Dari suatu eksperimen diperoleh data sebagai berikut:

No.	Bahan	Rumus kimia	Nyala lampu
1. 2. 3	Hidrogen klorida Gula Asam cuka	HCl C₁₂H₂₂O₁₁ CH₃COOH	Terang Tidak nyala Menyala

Kekuatan elektrolit yang sesuai data di atas adalah...

Asam cuka < Gula

Asam cuka < Asam klorida

Asam klorida < Asam cuka

Gula > Asam cuka

Gula = Asam Klorida

The given data shows that the lamp only lights up when the substance is either hydrochloric acid (HCl) or vinegar (CH3COOH), but not when it is sugar (C12H22O11). This indicates that hydrochloric acid and vinegar are strong electrolytes, while sugar is a non-electrolyte. Since vinegar is unable to light up the lamp, it can be concluded that vinegar is a weaker electrolyte compared to hydrochloric acid. Therefore, the correct answer is "Asam cuka

Explanation

The given data shows that the lamp only lights up when the substance is either hydrochloric acid (HCl) or vinegar (CH3COOH), but not when it is sugar (C12H22O11). This indicates that hydrochloric acid and vinegar are strong electrolytes, while sugar is a non-electrolyte. Since vinegar is unable to light up the lamp, it can be concluded that vinegar is a weaker electrolyte compared to hydrochloric acid. Therefore, the correct answer is "Asam cuka

6. Zat elektrolit dan elektrolit lemah dapat menghantarkan listrik. Hal ini disebabkan oleh …

Adanya kisi kristal yang saling terikat dengan kuat

Adanya pelepasan elektron dalam zat tersebut

Terjadi serah terima elktron antara kation dan anion

Tidak adanya proses ionisasi atau pembentukan ion dalam senyawa tersebut

Adanya proses pembentukan ion dan elektron dapat bergerak bebas yang membentuk lautan elektron

The correct answer is "Adanya proses pembentukan ion dan elektron dapat bergerak bebas yang membentuk lautan elektron." This is because electrolytes and weak electrolytes are able to conduct electricity due to the presence of ions and free-moving electrons in the substance, which form an electron sea. This allows for the flow of electric current.

Explanation

The correct answer is "Adanya proses pembentukan ion dan elektron dapat bergerak bebas yang membentuk lautan elektron." This is because electrolytes and weak electrolytes are able to conduct electricity due to the presence of ions and free-moving electrons in the substance, which form an electron sea. This allows for the flow of electric current.

7. Zat non – elektrolit dalam larutannya akan berada dalam bentuk …

Molekul

Kation

Anion

Senyawa ion

Padatan

Zat non-elektrolit dalam larutannya akan berada dalam bentuk molekul. Non-elektrolit adalah zat yang tidak mengion saat larut dalam air. Molekul adalah partikel yang terbentuk dari dua atau lebih atom yang terikat bersama melalui ikatan kimia. Dalam larutan non-elektrolit, zat tersebut tetap berada dalam bentuk molekul tanpa mengalami pemisahan atau pembentukan ion.

Explanation

Zat non-elektrolit dalam larutannya akan berada dalam bentuk molekul. Non-elektrolit adalah zat yang tidak mengion saat larut dalam air. Molekul adalah partikel yang terbentuk dari dua atau lebih atom yang terikat bersama melalui ikatan kimia. Dalam larutan non-elektrolit, zat tersebut tetap berada dalam bentuk molekul tanpa mengalami pemisahan atau pembentukan ion.

8. Diantara bahan berikut:

Gula
Garam
Cuka
Urea
Pemutih
Alkohol
asam sulfat
Bensin

Yang larutannya dapat menghantarkan arus listrik adalah....

1, 2, 3, 7

1, 3, 5, 8

2, 3, 5, 7

1, 4, 6, 8

2, 3, 4, 5

The substances that can conduct electricity are those that are able to dissociate into ions in solution. In this case, the substances that can conduct electricity are garam (salt), cuka (vinegar), and alkohol (alcohol). These substances are able to dissociate into ions when dissolved in water, allowing for the flow of electric current.

Explanation

The substances that can conduct electricity are those that are able to dissociate into ions in solution. In this case, the substances that can conduct electricity are garam (salt), cuka (vinegar), and alkohol (alcohol). These substances are able to dissociate into ions when dissolved in water, allowing for the flow of electric current.

9.

Berikut hasil percobaan daya hantar listrik dari beberapa larutan

Zat	Lampu	Pengamatan lain
1. 2. 3. 4.	Nyala terang Nyala redup Tidak nyala Tidak nyala	Banyak gelembung Banyak gelembung Sedikit gelembung Tidak ada gelembung

Dari data di atas, pasangan yang digolongkan elektrolit kuat dan elektrolit lemah berturut-turut adalah...

1 dan 2

1 dan 3

1 dan 4

2 dan 4

3 dan 4

Based on the given data, the substances in pair 1 and 2 are classified as strong electrolytes and weak electrolytes respectively. This is because the lamp in pair 1 lights up brightly, indicating a high conductivity of electricity, while the lamp in pair 2 only lights up dimly, indicating a lower conductivity of electricity. Therefore, pair 1 can be classified as a strong electrolyte and pair 2 can be classified as a weak electrolyte.

Explanation

Based on the given data, the substances in pair 1 and 2 are classified as strong electrolytes and weak electrolytes respectively. This is because the lamp in pair 1 lights up brightly, indicating a high conductivity of electricity, while the lamp in pair 2 only lights up dimly, indicating a lower conductivity of electricity. Therefore, pair 1 can be classified as a strong electrolyte and pair 2 can be classified as a weak electrolyte.

10. Dari beberapa contoh larutan ini, yang dapat menghanarkan listrik paling baik adalah larutan ...

NaCl 1 M

CH3COOH 1 M

NaOH 1 M

HCl 1 M

H2SO4 1 M

H2SO4 1 M is the correct answer because it is a strong acid that completely ionizes in water, producing a high concentration of ions. This high concentration of ions allows for better conductivity of electricity compared to the other solutions listed. NaCl, CH3COOH, NaOH, and HCl are all weak electrolytes, meaning they only partially ionize in water and therefore have lower concentrations of ions.

Explanation

H2SO4 1 M is the correct answer because it is a strong acid that completely ionizes in water, producing a high concentration of ions. This high concentration of ions allows for better conductivity of electricity compared to the other solutions listed. NaCl, CH3COOH, NaOH, and HCl are all weak electrolytes, meaning they only partially ionize in water and therefore have lower concentrations of ions.

11.

K²⁺ dan SO₄^2-
K⁺ dan SO₄^-
K⁺ dan SO₄^2-
2K⁺ dan SO₄^-
2K²⁺ dan SO₄^2-

Di antara Hasil Reaksi ionisasi diatas yang tepat untuk senyawa K₂SO₄adalah ….

1

2

3

4

5

The correct answer is 5 because K2SO4 is a compound consisting of two K+ ions and one SO42- ion. Therefore, the correct combination of ions from the given options is 2K2+ and SO42-.

Explanation

The correct answer is 5 because K2SO4 is a compound consisting of two K+ ions and one SO42- ion. Therefore, the correct combination of ions from the given options is 2K2+ and SO42-.

12. Diantara bahan berikut:

Gula
Garam
Cuka
Urea
Pemutih
Alkohol
asam sulfat
Bensin

yang larutannya dapat menghantarkan arus listrik adalah....

1, 2, 3, 7

1, 3, 5, 8

2, 3, 5, 7

1, 4, 6, 8

2, 3, 4, 5

The substances that can conduct electricity are those that are able to dissociate into ions when dissolved in water. Among the given options, gula (sugar), garam (salt), asam sulfat (sulfuric acid), and alkohol (alcohol) are the substances that can dissolve in water and dissociate into ions, allowing the flow of electric current. Therefore, options 1, 4, 6, and 8 are the correct choices.

Explanation

The substances that can conduct electricity are those that are able to dissociate into ions when dissolved in water. Among the given options, gula (sugar), garam (salt), asam sulfat (sulfuric acid), and alkohol (alcohol) are the substances that can dissolve in water and dissociate into ions, allowing the flow of electric current. Therefore, options 1, 4, 6, and 8 are the correct choices.

Are You A Chemist? (Quiz)