Khi đốt cháy hoàn toàn 3,51 gam hỗn hợp glucozơ và saccarozơ

Glucose is a crystalline substance, colorless, difficult to melt, easily soluble in water, with a sweet taste.

– Glucose is present in almost all parts of the plant such as leaves, flowers, roots… and is abundant in ripe fruit (many in grapes), so people also call glucose as grape sugar.

– Honey has a lot of glucose (30%), in the blood (concentration 0.1%). The sweetness of glucose is lower than that of cane sugar.

CTPT is C6HtwelvethO6 exists in open circuit and loop form.

1. Open circuit type:

6 5 4 3 2 First
ONLY2OH- FOR H- FOR H- FOR H- FOR H- CH = O

The structural formula of glucose has been determined experimentally

• Complete reduction of glucose for hexane. So glucose molecule has 6 C atoms forming an unbranched chain.

• Glucose has a silver coating reaction, when reacting with bromine water → gluconic acid → there is a group of CH = O.

• Glucose reacts with Cu(OH)2 form a blue solution → there are many –OH groups adjacent to each other.

• Glucose only reacts with3COOH produces only one ester containing 5 . radicals3COO- → has 5 -OH groups.

2. Repeat form

– Glucose crystallizes to produce two crystalline forms with two different ring configurations.

In solution, glucose exists mainly in the form of hexagonal rings (α and β).

– OH group in C. PositionFirst called OH hemixetal.

III. What is the chemical property of glucose?

Once we know the chemistry of glucose, we can do chemistry exercises more easily. Glucose will have the same chemical properties as that of monofunctional aldehydes and polyfunctional alcohols. Specifically:

1. Properties of multifunctional alcohol

Glucose reacts with Cu(OH)2 At room temperature, glucose will be able to dissolve the Cu(OH) precipitate.2 and form a blue copper-glucose complex solution. The chemical equation is as follows:

2 C6HtwelvethO6 + Cu(OH)2 → (C6H11O6)2Cu + 2H2O

When glucose reacts to form an ester, the resulting product contains 5 acetic acid radicals in the molecule when reacting with acetic anhydride (CH).3CO)2O, pyridine is present.

2. Properties of aldehydes

The silver coating reaction of glucose

AgNO. solution3 capable of oxidizing glucose in the environment3. The resulting products are ammonium gluconate and silver salts. They will stick to the wall of the test tube and we can see. The procedure is as follows:

ONLY2OH[CHOH]4FOR + 2AgNO3 + 3NHS3 + FRIENDS2O (dk: to) → ONLY2OH[CHOH]4COONH4 + 2Ag + 2NH4ARE NOT3

Glucose is oxidized by Cu(OH)2

Glucose is oxidized by Cu(OH)2 in alkaline environment. The result is sodium gluconate, copper(I) oxide and H2O. We have the equation:

ONLY2OH[CHOH]4CHO + 2Cu(OH)2 + NaOH (dk: to)→ ONLY2OH[CHOH]4COONa + Cu2O ↓ (brick red) + 3H2O

Glucose is reduced by hydrogen

When hydrogen gas is added to a heated glucose solution with the addition of a Ni catalyst, a polymer called sobitol is obtained:

ONLY2OH[CHOH]4FOR + THEM2(dk: toNi)→ ONLY2OH[CHOH]4ONLY2OH

3. Glucose fermentation reaction

When enzymes catalyze, glucose will be fermented. The resulting products are ethyl alcohol and carbon dioxide. Their equations are as follows:

OLD6HtwelvethO6 (unit: enzyme, 30-35oC) → 2C2H5OH + 2CO2

IV. Modulation and application

1. Modulation (in industry)

– Hydrolysis of starch with the catalyst is dilute HCl or enzyme.

Hydrolysis of cellulose with concentrated HCl catalyst

(C)6HtenO5)WOMEN + nH2O → nC6H12O6

2. Application

– In medicine: used as an energizing drug for patients (easy to absorb and distribute a lot of energy)

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– In industry: used for mirror coating, thermos coating (instead of aldehydes because aldehydes are very toxic)

Posted by: Tran Hung Dao High School

Category: Grade 12, Chemistry 12

[rule_{ruleNumber}]

#When #burnt #completely #gram #mixture #glucose #and #sucrose

[rule_3_plain]

#When #burnt #completely #gram #mixture #glucose #and #sucrose

Question: At complete combustion of 3.51 grams of a mixture of glucose and sucrose, 0.12 moles of O2 are needed, CO2 and mg of H2O are obtained. What is the value of m?
Answer:
Solution method:
Give the general formula of glucose and sucrose in the form Cn(H2O)m
When burning these two substances, in fact, only C burns, and H2O does not burn, so nC = nO2
From there, calculate mC, take the total initial mass minus mC, we are left with mH2O.
Specific prizes:

Give the general formula of glucose and sucrose in the form Cn(H2O)m
When burning these two substances, in fact, only C burns, and H2O does not burn, so:
Let’s learn about glucose with Tran Hung Dao High School!
I- Physical properties. The natural state of Glucozo

Glucose is a crystalline substance, colorless, difficult to melt, easily soluble in water, with a sweet taste
– Glucose is present in most parts of the plant such as leaves, flowers, roots … and is abundant in ripe fruit (many in grapes), so it is also called glucose as grape sugar.
– In honey there is a lot of glucose (30%), in the blood (concentration 0.1%). The sweetness of glucose is less than that of cane sugar.
II- Molecular Structure
CTPT is C6H12O6 which exists in open circuit and loop form.
1. Open circuit type:
The glucose molecule has the reduced structural formula:
6
5
4
3
2
first
CH2OH-
FOR H-
FOR H-
FOR H-
FOR H-
CH=O
The structural formula of glucose was determined experimentally
• Complete reduction of glucose for hexane. So there are 6 C atoms of the glucose molecule forming an unbranched chain.
• Glucose has a silver coating reaction, when reacting with bromine water → gluconic acid → has a group of CH = O.
• Glucose reacts with Cu(OH)2 to create a blue solution → there are many -OH groups adjacent to each other.
• Glucose reacts with CH3COOH to create an ester containing 5 CH3COO- radicals → with 5 -OH groups.
2. Loop form
– Glucose crystallizes to produce two crystal forms corresponding to two different ring structures.
In solution, glucose exists mainly in the form of hexagonal rings (α and β).
– The OH group at the C1 position is called the OH hemixetal.
III. What is the chemical property of glucose?
Once we know what the chemistry of glucose is, we can do chemistry exercises more easily. Glucose will have the same chemical properties as that of monofunctional aldehydes and polyfunctional alcohols. Detail:
1. Properties of polyfunctional alcohols
When glucose reacts with Cu(OH)2 at normal temperature, glucose will be able to dissolve the Cu(OH)2 precipitate and form a blue-colored glucose copper complex solution. The chemical equation is as follows:
2C6H12O6 + Cu(OH)2 → (C6H11O6)2Cu + 2H2O
When glucose reacts to form esters, the resulting product contains 5 acetic acid radicals in the molecule when reacting with acetic anhydride (CH3CO)2O, in the presence of pyridine.
2. Properties of aldehydes
The silver coating reaction of glucose
AgNO3 solution is capable of oxidizing Glucose in NH3 environment. The resulting products are ammonium gluconate and silver salts. They will stick to the wall of the test tube and we can see. The procedure is as follows:
CH2OH[CHOH]4CHO + 2AgNO3 + 3NH3 + H2O (unit: to) → CH2OH[CHOH]4COONH4 + 2Ag + 2NH4NO3
+ Glucose is oxidized by Cu(OH)2
Glucose is oxidized by Cu(OH)2 in alkaline medium. The result is sodium gluconate, copper(I) oxide and H2O. We have the equation:
CH2OH[CHOH]4CHO + 2Cu(OH)2 + NaOH (unit: to) → CH2OH[CHOH]4COONa + Cu2O (brick red) + 3H2O
Glucose is reduced by hydrogen
When hydrogen gas is introduced into a heated glucose solution with the addition of a Ni catalyst, we will obtain a polyancol called sobitol:
CH2OH[CHOH]4CHO + H2 (unit: to, Ni) → CH2OH[CHOH]4CH2OH
3. Glucose fermentation reaction
When enzymes catalyze, glucose will be fermented. The resulting products are ethyl alcohol and carbon dioxide. Their equations are as follows:
C6H12O6 (unit: enzyme, 30-35oC) → 2C2H5OH + 2CO2
IV. Modulation and application
1. Modulation (in industry)
– Hydrolysis of starch with catalyzed by dilute HCl or enzyme
Hydrolysis of cellulose with concentrated HCl catalyst
(C6H10O5)n + nH2O → nC6H12O6
2. Application
– In medicine: used as an energizing drug for patients (easy to absorb and distribute a lot of energy)
– In industry: used for mirror coating, thermos coating (instead of aldehydes because aldehydes are toxic)
Posted by: Tran Hung Dao High School
Category: Grade 12, Chemistry 12

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#When #burnt #completely #gram #mixture #glucose #and #sucrose

[rule_2_plain]

#When #burnt #completely #gram #mixture #glucose #and #sucrose

[rule_2_plain]

#When #burnt #completely #gram #mixture #glucose #and #sucrose

[rule_3_plain]

#When #burnt #completely #gram #mixture #glucose #and #sucrose

Question: At complete combustion of 3.51 grams of a mixture of glucose and sucrose, 0.12 moles of O2 are needed, CO2 and mg of H2O are obtained. What is the value of m?
Answer:
Solution method:
Give the general formula of glucose and sucrose in the form Cn(H2O)m
When burning these two substances, in fact, only C burns, and H2O does not burn, so nC = nO2
From there, calculate mC, take the total initial mass minus mC, we are left with mH2O.
Specific prizes:

Give the general formula of glucose and sucrose in the form Cn(H2O)m
When burning these two substances, in fact, only C burns, and H2O does not burn, so:
Let’s learn about glucose with Tran Hung Dao High School!
I- Physical properties. The natural state of Glucozo

Glucose is a crystalline substance, colorless, difficult to melt, easily soluble in water, with a sweet taste
– Glucose is present in most parts of the plant such as leaves, flowers, roots … and is abundant in ripe fruit (many in grapes), so it is also called glucose as grape sugar.
– In honey there is a lot of glucose (30%), in the blood (concentration 0.1%). The sweetness of glucose is less than that of cane sugar.
II- Molecular Structure
CTPT is C6H12O6 which exists in open circuit and loop form.
1. Open circuit type:
The glucose molecule has the reduced structural formula:
6
5
4
3
2
first
CH2OH-
FOR H-
FOR H-
FOR H-
FOR H-
CH=O
The structural formula of glucose was determined experimentally
• Complete reduction of glucose for hexane. So there are 6 C atoms of the glucose molecule forming an unbranched chain.
• Glucose has a silver coating reaction, when reacting with bromine water → gluconic acid → has a group of CH = O.
• Glucose reacts with Cu(OH)2 to create a blue solution → there are many -OH groups adjacent to each other.
• Glucose reacts with CH3COOH to create an ester containing 5 CH3COO- radicals → with 5 -OH groups.
2. Loop form
– Glucose crystallizes to produce two crystal forms corresponding to two different ring structures.
In solution, glucose exists mainly in the form of hexagonal rings (α and β).
– The OH group at the C1 position is called the OH hemixetal.
III. What is the chemical property of glucose?
Once we know what the chemistry of glucose is, we can do chemistry exercises more easily. Glucose will have the same chemical properties as that of monofunctional aldehydes and polyfunctional alcohols. Detail:
1. Properties of polyfunctional alcohols
When glucose reacts with Cu(OH)2 at normal temperature, glucose will be able to dissolve the Cu(OH)2 precipitate and form a blue-colored glucose copper complex solution. The chemical equation is as follows:
2C6H12O6 + Cu(OH)2 → (C6H11O6)2Cu + 2H2O
When glucose reacts to form esters, the resulting product contains 5 acetic acid radicals in the molecule when reacting with acetic anhydride (CH3CO)2O, in the presence of pyridine.
2. Properties of aldehydes
The silver coating reaction of glucose
AgNO3 solution is capable of oxidizing Glucose in NH3 environment. The resulting products are ammonium gluconate and silver salts. They will stick to the wall of the test tube and we can see. The procedure is as follows:
CH2OH[CHOH]4CHO + 2AgNO3 + 3NH3 + H2O (unit: to) → CH2OH[CHOH]4COONH4 + 2Ag + 2NH4NO3
+ Glucose is oxidized by Cu(OH)2
Glucose is oxidized by Cu(OH)2 in alkaline medium. The result is sodium gluconate, copper(I) oxide and H2O. We have the equation:
CH2OH[CHOH]4CHO + 2Cu(OH)2 + NaOH (unit: to) → CH2OH[CHOH]4COONa + Cu2O (brick red) + 3H2O
Glucose is reduced by hydrogen
When hydrogen gas is introduced into a heated glucose solution with the addition of a Ni catalyst, we will obtain a polyancol called sobitol:
CH2OH[CHOH]4CHO + H2 (unit: to, Ni) → CH2OH[CHOH]4CH2OH
3. Glucose fermentation reaction
When enzymes catalyze, glucose will be fermented. The resulting products are ethyl alcohol and carbon dioxide. Their equations are as follows:
C6H12O6 (unit: enzyme, 30-35oC) → 2C2H5OH + 2CO2
IV. Modulation and application
1. Modulation (in industry)
– Hydrolysis of starch with catalyzed by dilute HCl or enzyme
Hydrolysis of cellulose with concentrated HCl catalyst
(C6H10O5)n + nH2O → nC6H12O6
2. Application
– In medicine: used as an energizing drug for patients (easy to absorb and distribute a lot of energy)
– In industry: used for mirror coating, thermos coating (instead of aldehydes because aldehydes are toxic)
Posted by: Tran Hung Dao High School
Category: Grade 12, Chemistry 12

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