The chemical method used to distinguish 4 solutions in separate vials containing HCl, HNO3, KCl, KNO3 is:

A.

B.

C.

D.

a) KOH, K2SO4, KCl, KNO3

-Use purple kneeling recognize KOH (turns blue);

-Use BaCl2 people know K2SO4 because of the formation of a white precipitate

-The rest are KCl, KNO3. Using AgNO3: Which test tube gives a white precipitate is KCl and the other is KNO3.

b) HCl, NaOH, Ba(OH)2 , Na2SO4, I2

-Use kneel down to find get HCl (makes litmus red), and 2 groups: the first group is NaOH, Ba(OH)2 (makes litmus blue), the third group is Na2SO4, I2 (doesn’t change litmus color).

– Use Na2SO4 To identify group 1, which test tube gives the white precipitate BaSO4 is Ba(OH)2, the other is NaOH

– Use Ba(OH)2 just received in group 1 to identify Na2SO4 in group 2.

c) NaCl, HCl, KOH, NaNO3, HNO3, Ba(OH)2

-Use kneel down to find get group 1 HCl, HNO3 (make litmus red), the second group is KOH, Ba(OH)2 (make litmus blue), the third group is NaCl, NaNO3 (do not change litmus color).

– Use AgNO3 identify group 1,3 : which tube gives white precipitate (AgCl) is HCl and NaCl, the rest is HNO3, NaNO3

– Use Na2SO4 To identify group 2, which test tube gives the white precipitate BaSO4 is Ba(OH)2, the other is KOH

d) NaCl, NaBr, NaI, HCl, H2SO4, NaOH

-Use kneel down to find get group 1 HCl, H2SO4 (make litmus red), the second group is NaOH (make litmus blue), the third group is NaCl, NaBr, NaI (do not change litmus color).

– Use BaCl2 H2SO4 is known because it produces a white precipitate; the rest is HCl

-Use AgNO3: Which test tube gives white precipitate is NaCl, light yellow precipitate is NaBr, dark yellow precipitate is NaI.

e) Use only blue litmus: Na2SO4, NaOH, HCl, Ba(OH)2

-Use kneel down to find get group 1 HCl (red litmus), 2nd group is NaOH; Ba(OH)2 (makes litmus blue), the third group is Na2SO4 (doesn’t change litmus).

– Use Na2SO4 In group 3 to identify group 1, which test tube gives the white precipitate BaSO4 is Ba(OH)2, the rest is NaOH

h) gas: Cl2, O2, CO2

-Conducted through a clear lime water tank, the gas that gives the precipitate is CO2;

– Lead the remaining 2 gases through the red embers, the burning embers receive O2. The rest is Cl2

Answer: Answer B is correct

Explanation of the steps:

When we put red litmus into the jars, we see the following phenomenon:

HCl, HNO3 gives red (acid) color (group 1)

KCl, KNO3 does not discolor (salt) (group 2)

For AgNO3 In each group we see

Group 1: Vial gives a white precipitate of HCl (AgCl precipitate)

Group 2: Vial gives a white precipitate as KCl (AgCl precipitate)

Top 1 ✅ Distinguish the following 4 solutions: KOH, Ba[OH]2,KCl,KNO3 male 2022 last updated at 2022-02-15 05:38:58 along with other related topics

Distinguish the following 4 solutions: KOH,Ba[OH]2,KCl,KNO3

Ask:

Distinguish the following 4 solutions: KOH,Ba[OH]2,KCl,KNO3

Distinguish the following 4 solutions: KOH,Ba[OH]2,KCl,KNO3

Answer:

tuanh:

Answer:

Explanation of the steps:

– Extract 4 solutions as test samples and then add red litmus to each test sample

+]Purple litmus turns green: $KOH, Ba[OH]_2$ [1]

+]Purple litmus does not change color: $KCl, KNO_3$ [2]

– Put the $AgNO_3$ solution into the test sample [2]

+]There is a white precipitate⇒ $KCl$

$AgNO_3+KCl → AgCl↓ + KNO_3$

+]No phenomenon: $KNO_3$

– Put the solution $H_2SO_4$ into the test sample [1]

+]If there is a white precipitate then that’s it: $Ba[OH]_2$

$H_2SO_4 + Ba[OH]_2 → BaSO_4↓+ 2H_2O $

+]Left over: $KOH$

tuanh:

Answer:

Explanation of the steps:

– Extract 4 solutions as test samples and then add red litmus to each test sample

+]Purple litmus turns green: $KOH, Ba[OH]_2$ [1]

+]Purple litmus does not change color: $KCl, KNO_3$ [2]

– Put the $AgNO_3$ solution into the test sample [2]

+]There is a white precipitate⇒ $KCl$

$AgNO_3+KCl → AgCl↓ + KNO_3$

+]No phenomenon: $KNO_3$

– Put the solution $H_2SO_4$ into the test sample [1]

+]If there is a white precipitate then that’s it: $Ba[OH]_2$

$H_2SO_4 + Ba[OH]_2 → BaSO_4↓+ 2H_2O $

+]Left over: $KOH$

tuanh:

Answer:

Explanation of the steps:

– Extract 4 solutions as test samples and then add red litmus to each test sample

+]Purple litmus turns green: $KOH, Ba[OH]_2$ [1]

+]Purple litmus does not change color: $KCl, KNO_3$ [2]

– Put the $AgNO_3$ solution into the test sample [2]

+]There is a white precipitate⇒ $KCl$

$AgNO_3+KCl → AgCl↓ + KNO_3$

+]No phenomenon: $KNO_3$

– Put the solution $H_2SO_4$ into the test sample [1]

+]If there is a white precipitate then that’s it: $Ba[OH]_2$

$H_2SO_4 + Ba[OH]_2 → BaSO_4↓+ 2H_2O $

+]Left over: $KOH$

Distinguish the following 4 solutions: KOH,Ba[OH]2,KCl,KNO3

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Lesson 4: Identify the following unlabeled solutions by chemical method: a. KOH, KCl, K2SO4[OH]2

b. HCl, NaOH, Ba[OH]2, Na2SO4​ d. NaCl, NaBr, NaI, HCl, H2SO4, NaOH

Top 1 ✅ Show how to identify the following solutions that have lost their labels: na2so4, kno3, kcl, nah nam 2022 last updated at 2022-02-25 19:32:23 along with other related topics

Show how to identify the following unlabeled solutions: na2so4, kno3, kcl nah

Ask:

Show how to identify the following unlabeled solutions: na2so4, kno3, kcl nah

Show how to identify the following unlabeled solutions: na2so4, kno3, kcl nah

Answer:

lanminhngoc:

Answer:

-Use AgNO3: Which test tube gives white precipitate, the remaining KCl is KNO3.

– Use Na2SO4 to identify which group 1, test tubes give white precipitate BaSO4 à Ba[OH]2, remaining à NaOH

– Use Ba[OH]2 just received in group 1 to identify Na2SO4 in group 2.

lanminhngoc:

Answer:

-Use AgNO3: Which test tube gives white precipitate, the remaining KCl is KNO3.

– Use Na2SO4 to identify which group 1, test tubes give white precipitate BaSO4 à Ba[OH]2, remaining à NaOH

– Use Ba[OH]2 just received in group 1 to identify Na2SO4 in group 2.

lanminhngoc:

Answer:

-Use AgNO3: Which test tube gives white precipitate, the remaining KCl is KNO3.

– Use Na2SO4 to identify which group 1, test tubes give white precipitate BaSO4 à Ba[OH]2, remaining à NaOH

– Use Ba[OH]2 just received in group 1 to identify Na2SO4 in group 2.

Show how to identify the following unlabeled solutions: na2so4, kno3, kcl nah

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By chemical means, identify: a]4 dd: NaOH, HCl, K2SO4, KCl. b]4 dd:KOH, K2SO4, K2CO3, KNO3. c]4 metals: Al, Ag, Fe, Na d]4 solids: CaO, Fe2O3, Na2O, P2O5.

Identify the following unlabeled solutions by chemical method a]NaNO3, CuCl2, K2CO3, K2S

b]Cu[NO3]2, NH4Cl, Na2SO3, LiSO4

c]CuSO4, [NH4]2CO3, LiBr, Na3PO4

d]NaCl, KNO3, BaCl2, NH4NO3

chemically identify the following unlabelled solutions:

a, HNO3, NaCl, Ba[OH]2

b, NaCl, NaOH, H2SO4

c, KOH, KNO3, HCl

d, Na2SO4, NaOH, H2SO4

  • theory
  • multiple-choice
  • Q&A
  • sgk exercises

Know :

a]KOH,K2SO4,KCl,KNO3

b]HCl,NaOH,Ba[OH]2,Na2SO4

c]NaC,HCl,KOH,NaNO3,HNO3,Ba[OH]2

d]NaCl,NaBr,NAI,HCl,H2SO4,NaOH

Similar questions

Identify substances:

a]HCl, NaOH, Na2SO4, NaNO3

b]KYOHThree[OH]2ThreeCl2Na2SO4

c]Na2CO3 NaCl Na2SO4 NaNO3

d]HCl , H2SO4 , HNO3femaleaOH

State the chemical method for the identification of the following colorless and transparent solutions:

a]Ca[NO3]2, HCl, Ba[OH]2

b]Na2CO3, NaOH, NaCl, HCl.

c]HCl, NaOH, Na2SO4, NaCl, NaNO3.

Identify the following required substances:

1. By chemical method identify the following solids

a]CaO, Na2O, MgO, P2O5

b]CaCO3, CaO, Ca[OH]2

2. Using only red litmus, identify the following solutions:

a]H2SO4, NaOH, HCl, BaCl2

b) NaCl, Ba[OH]2, NaOH, H2SO4

3. Chemically identify solutions:

a]NaOH, HCl, NaNO3, NaCl

b]Hcl, H2SO4, NaOH, Ba[OH]2, NaCl, NaNO3

1. How to identify the following solutions: NaCl, Na2SO4, NaOH, Na2CO3

A. Blue litmus, HCl, H2SO4

B. Purple litmus, HCl

C. Purple litmus, H2SO4, KCl

D. Blue litmus, HCl, BaCl2

2. Solution A turns colorless phenolphthalein red. What is the pH of A?

A. Unidentified

B. pH [A] < 7

C. pH [A] > 7

D. pH [A] = 7

3. Nitrogen fertilizers provide plants with what main nutrients?

A. Mg

B. WOMEN

C. KY

D. P

4. Which of the following is not an exchange reaction?

A. CuSO4 + 2NaOH -> Na2SO4 + Cu[OH]2

B. Na2CO3 + CaCl2 -> CaCO3 + 2NaCl

C. Na2SO3 + 2KOH -> 2NaOH + K2SO3

D. BaCl2 + H2SO4 -> BaSO4 + 2HCl

5. Which substance is a dual fertilizer?

A. NH4NO3

B. [NH4]2HPO4

C. NaNO3

D. K2SO4

6. Solid NaOH has a very strong ability to absorb water, so it can be used to dry some substances. Which of the following warm gases does NaOH dry?

A. SO2

B. CO2

C. H2S

D. H2

7. In nature, sodium chloride salt is abundant in:

A. River water

B. Sea water

C. Rainwater

D. Well water

8. The series of substances consisting of soluble bases are:

A. Al[OH]3 ; Fe[OH]2; Cu[OH]2

B . NaOH , Mg[OH]2 ; KOH

C. KOH ; NaOH ; three[OH]2

D. Ba[OH]2 ; KOH ; Mg[OH]2

9. The series of substances are bases:

A. Fe[OH]2 ; Mg[OH]2 , Al[OH]3, KOH

B. CO2, Mg[OH]2 , AlCl3 , KOH

C. CO2, MgO, Al2O3, K2O

D. H2CO3, HNO3, HCl, H2SO4

Distinguish chemicals in unlabelled bottles by chemical method.

a]Al, Fe, Cu

b]Solutions: NaOH, HCl, BaCl2, H2SO4

c]Solutions: NaCl, NaNO3, NaOH

d]Solutions: NaCl, H2SO4, NaOH, Ba[OH]2

e]Fish solution: KCl, KNO3, K2CO3

1. The series of substances are all salts:

A. H2SO3, HNO3, HCl, H2SO4

B. Na2SO3, CaCO3, AlCl3, MgSO4

C. SO2, Ca[OH]2 , FeCl3 , NaOH

D. CO2, MgO, Fe2O3, Na2O

2. What series of bases are decomposed by heat?

A. Fe[OH]3 , KOH , Zn[OH]2

B. NaOH , KOH , Ba[OH]2

C. Cu[OH]2 , Al[OH]3 , Mg[OH]2

D. Ca[OH]2 , Fe[OH]2, NaOH

3. Which series contains insoluble bases?

A. Fe[OH]2 , Fe[OH]3, KOH

B. Ca[OH]2 , Cu[OH]2 , Ba[OH]2

C. NaOH , KOH , Al[OH]3

D. Mg[OH]2 , Cu[OH]2 , Fe[OH]3

4. Lead CO2 into Ca . solution[OH]What happens if there are 2 residuals?

A. DD turns red

B. DD didn’t change anything

C. There is a white precipitate

D. DD is blue

5. Drop NaOH solution into a test tube containing iron salt solution [III] chloride. What is the chemical phenomenon that occurs?

A. Appearance of a reddish brown precipitate

B. Appearance of white precipitate

C. Appearance of black precipitate

D. Appearance of blue precipitate

6. Mix 200ml of 1M NaOH solution with 300ml of 0.5M HCl solution. The wrong solution turns red litmus to what color?

A. White [quỳ tím bị mất màu]

B. Red

C. Purple [quỳ tím không chuyển màu]

D. Blue

7. Which of the following chemical reactions is used to produce NaOH in industry?

A. 2NaCl + 2H2O DPDD -> 2NaOH + H2 + Cl2

B. Na2CO3 + Ca[OH]2 -> CaCO3 + 2NaOH

C. Na2O + H2O -> 2NaOH

D. 2Na + 2H2O -> 2NaOH +H2

8. Mixing which of the following 2 solutions does not appear precipitate?

A. BaCl2, AgNO3

B. NaCl , K2SO4

C. Na2CO3, Ba[OH]2

D. BaCl2, Na2SO4

9. The series of substances that can react with CuSO4 are:

A. BaCl2, NaOH, Fe

B. H2O , FeO , H2SO4

C. NaOH , HCl , BaCl2

D . HCl , H2SO4 , MgO

10. The series of substances consisting of neutral salts is:

A. NaCl , BaCO3 , Al2[SO4]3

B. Na2CO3, NaHCO3, CuSO4

C. K2O , CuO , P2O5

D. KHCO3, NaHSO4, KH2PO4

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