Nồng độ Ion H+ Có Trong Dung Dịch H2SO4 0,1M Là: | Cungthi.online
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- Nồng độ ion H+ có trong dung dịch H2SO4 0,1M là:
Nồng độ ion H+ có trong dung dịch H2SO4 0,1M là:
A.0,1 M.
B.0,2 M.
FeedbackVậy đáp án đúng là B.
C.0,5 M.
D.0,05 M.
Những câu hỏi này đến từ bài kiểm tra này. Bạn có muốn thực hiện bài kiểm tra thử không?
Bài tập trắc nghiệm 15 phút 1. Khái niệm chất điện ly, sự điện ly, axit – bazơ – muối – hidroxit lưỡng tính - Hóa học 11 - Đề số 3- 15 phút
- 10 câu hỏi
Một số câu hỏi từ cùng một bài kiểm tra
Sự điện li của H2S trong nước được biểu diễn như sau: H2S

H+ + HS- ; HS-
H+ + S2- . Các tiểu phân tồn tại trong dung dịch H2S là (bỏ qua sự điện li của H2O):Hiđroxit nào sau đây không phải là hiđroxit lưỡng tính:
Tính nồng độ ion OH- và pH của dung dịch Ba(OH)2 0,005M :
Nồng độ ion H+ có trong dung dịch H2SO4 0,1M là:
Câu nào sau đây đúng:
Kết luận nào sau đây không đúng?
Muối amoni là chất điện li thuộc loại:
Viết phương trình phân tử và phương trình ion rút gọn của phản ứng:
a. Na2SO3 + H2SO4
b. ZnS + HCl 
Theo thuyết
- rê - ni - ơt chất nào sau đây khi tan trong nước vừa có thể phân li như axit, vừa có thể phân li như bazơ?Một dung dịch có pH=10 vậy [H+] và [OH-] là bao nhiêu?
Một số câu hỏi khác bạn có thể quan tâm
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According to the passage, which of the following is TRUE of webmasters?
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Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions.
Plants are subject to attack and infection by a remarkable variety of symbiotic species and have evolved a diverse array of mechanisms designed to frustrate the potential colonists. These can be divided into preformed or passive defense mechanisms and inducible or active systems. Passive plant defense comprises physical and chemical barriers that prevent entry of pathogens, such as bacteria, or render tissues unpalatable or toxic to the invader. The external surfaces of plants, in addition to being covered by an epidermis and a waxy cuticle, often carry spiky hairs known as trichomes, which either prevent feeding by insects or may even puncture and kill insect larvae. Other trichomes are sticky and glandular and effectively trap and immobilize insects. If the physical barriers of the plant are breached, then preformed chemicals may inhibit or kill the intruder, and plant tissues contain a diverse array of toxic or potentially toxic substances, such as resins, tannins, glycosides, and alkaloids, many of which are highly effective deterrents to insects that feed on plants. The success of the Colorado beetle in infesting potatoes, for example, seems to be correlated with its high tolerance to alkaloids that normally repel potential pests. Other possible chemical defenses, while not directly toxic to the parasite, may inhibit some essential step in the establishment of a parasitic relationship. For example, glycoproteins in plant cell walls may inactivate enzymes that degrade cell walls. These enzymes are often produced by bacteria and fungi.
Active plant defense mechanisms are comparable to the immune system of vertebrate animals, although the cellular and molecular bases are fundamentally different. Both, however, are triggered in reaction to intrusion, implying that the host has some means of recognizing the presence of a foreign organism. The most dramatic example of an inducible plant defense reaction is the hypersensitive response. In the hypersensitive response, cells undergo rapid necrosis ― that is, they become diseased and die ― after being penetrated by a parasite ; the parasite itself subsequently ceases to grow and is therefore restricted to one or a few cells around the entry site. Several theories have been put forward to explain the bases of hypersensitive resistance.
The passage most probable continues with a discussion of theories on The word “identity” in paragraph 2 is closest in meaning to____________
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Read the following text and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.
Many ants forage across the countryside in large numbers and undertake mass migrations; these activities proceed because one ant lays a trail on the ground for the others to follow. As a worker ant returns home after finding a source of food, it marks the route by intermittently touching its stinger to the ground and depositing a tiny amount of trail pheromone – a mixture of chemicals that delivers diverse messages as the context changes. These trails incorporate no directional information and may be followed by other ants in either direction.
Unlike some other messages, such as the one arising from a dead ant, a food trail has to be kept secret from members of other species. It is not surprising then that ant species use a wide variety of compounds as trail pheromones. Ants can be extremely sensitive to these signals. Investigators working with the trail pheromone of the leafcutter ant Atta texana calculated that one milligram of this substance would suffice to lead a column of ants three times around Earth.
The vapor of the evaporating pheromone over the trail guides an ant along the way, and the ant detects this signal with receptors in its antennae. A trail pheromone will evaporate to furnish the highest concentration of vapor right over the trail, in what is called a vapor space. In following the trail, the ant moves to the right and left, oscillating from side to side across the line of the trail itself, bringing first one
and then the other antenna into the vapor space. As the ant moves to the right, its left antenna arrives in the vapor space.
The signal it receives causes it to swing to the left, and the ant then pursues this new course until its right antenna reaches the vapor space. It then swings back to the right, and so weaves back and forth down the trail.
What does the passage mainly discuss? The word “them” in paragraph 2 refers to____________.
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Read the following text and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions.
Many ants forage across the countryside in large numbers and undertake mass migrations; these activities proceed because one ant lays a trail on the ground for the others to follow. As a worker ant returns home after finding a source of food, it marks the route by intermittently touching its stinger to the ground and depositing a tiny amount of trail pheromone – a mixture of chemicals that delivers diverse messages as the context changes. These trails incorporate no directional information and may be followed by other ants in either direction.
Unlike some other messages, such as the one arising from a dead ant, a food trail has to be kept secret from members of other species. It is not surprising then that ant species use a wide variety of compounds as trail pheromones. Ants can be extremely sensitive to these signals. Investigators working with the trail pheromone of the leafcutter ant Atta texana calculated that one milligram of this substance would suffice to lead a column of ants three times around Earth.
The vapor of the evaporating pheromone over the trail guides an ant along the way, and the ant detects this signal with receptors in its antennae. A trail pheromone will evaporate to furnish the highest concentration of vapor right over the trail, in what is called a vapor space. In following the trail, the ant moves to the right and left, oscillating from side to side across the line of the trail itself, bringing first one
and then the other antenna into the vapor space. As the ant moves to the right, its left antenna arrives in the vapor space.
The signal it receives causes it to swing to the left, and the ant then pursues this new course until its right antenna reaches the vapor space. It then swings back to the right, and so weaves back and forth down the trail.
The word “intermittently” in paragraph 1 is closest in meaning to
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