According to one acid-base theory, water acts as an acid when an H2O molecule(1) accepts an H+ (3) accepts an H-
(2) donates an H+ (4) donates an H-
Answers
Final answer:
According to the Brønsted-Lowry acid-base theory, water is acting as an acid when a water molecule donates an H+ ion. This also illustrates that water can behave as both an acid and a base due to its amphoteric nature.
Explanation:
According to the Brønsted-Lowry theory of acids and bases, water acts as an acid when a H2O molecule donates an H+. This is because an acid is defined as a substance that can donate a proton, which is a hydrogen ion (H+). Water (H2O) can act as both an acid and a base due to its amphoteric nature, but in this context where we have to choose between these four options, water acts as an acid when it donates an H+. An example of this is when water donates an H+ to ammonia (NH3), producing the ammonium ion (NH4+) and a hydroxide ion (OH-).
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Related Questions
Oversteepened slopes often lead to mass movements becauseA. the angle of their slope is between 50 and 60 degrees. B. plants cannot grow on them. C. the angle of their slope is less than 50 degrees. D. the angle of their slope is greater than 40 degrees.
Which two gases make up most of the atmosphere?
Which element has the greatest average atomic mass?
Cartilage is not flexible. True False
B. A 2 kg pot at 120°C
C. A 5kg pot at 25°C
D. A 2 kg pot at 25°C
Answers
Final answer:
The 2 kg pot at 25°C has the least thermal energy because it has both a smaller mass and a lower temperature than the other options.
Explanation:
The thermal energy of an object is related to both its mass and its temperature. In this case, we are considering iron pots of different masses and temperatures. Given the options, the 2 kg pot at 25°C would have the least thermal energy. This is because it has both a smaller mass and a lower temperature than all the other options listed.
The thermal energy is calculated by multiplying the mass, specific heat, and change in temperature. An object with a smaller mass and lower temperature would therefore have less thermal energy.
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Answer: D. A 2 kg pot at 25C.
Explanation:
2) malleability and thermal conductivity
3) density and specific heat capacity
4) hardness and boiling point
Answers
Chromatography is an important analytical technique used to separate individual components from a mixture using their polarity difference. Thus option 1 is correct.
What is chromatography ?
Chromatographic technique is used to separate components from a mixture using their polarity and solubility in a solvent. There are different kinds of chromatographic techniques such as paper chromatography, column chromatography, ion-exchange chromatography etc.
All the chromatographic techniques uses the common principle that is the differential distribution of components between mobile phase and stationary phase.
A mobile phase is the movable side in the chromatographic column which brings the solutes to the bottom of the column . Stationary column is stationary and thus the solutes which are more adoured to the stationary side will elute last.
The attachment of solutes to the mobile phase or stationary phase is dependant upon their polarity and solubility in the solvent used. Thus, option 1 is correct.
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Answer:
Option-1 (Solubility and Molecular polarity) is the correct answer.
Explanation:
Thin Layer Chromatography is employed to separate a mixture of non volatile compounds. In this technique an adsorbent material like silica gel is coated on a plastic, glass or aluminium sheet. Then the mixture of compounds is applied at the bottom of sheet and the sheet is placed in the container containing a solvent system. It is observed that the solvent starts travelling upward through capillary action.
While the solvent is running the mixture of compounds starts separating from each other. This separation is due to following physical properties.
1) Solubility of Mixture in Solvent:
In a mixture those compounds which has more solubility in solvent will travel more and will give greater Rf value and the less soluble will left behind with smaller Rf value. Hence due to solubility a mixture of compounds can be separated.
2) Polarity of Molecules:
As the stationary phase (adsorbent material) is polar in nature, so in mixture those compounds which are less polar will less interact with the stationary phase and will travel more with greater Rf value, while, more polar molecules will form stronger interactions with the stationary phase, hence will travel less and therefore, will show smaller Rf values.
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The correct answer is - Jerusalem
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Answer:
We can assume that allforceactingontheboxarebalancedinalldirections.
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Ca + ZnCO3 = CaCO3 + Zn
Answer : The balanced chemical reaction will be,
Explanation :
Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.
If the amount of atoms of each type on the left and right sides of a reaction differs then to balance the equation by adding coefficient in the front of the elements or molecule or compound in the chemical equation.
The coefficient tell us about that how many molecules or atoms present in the chemical equation.
As per question, when calcium react with zinc carbonate then it react to give calcium carbonate and zinc as a product.
The balanced chemical reaction will be,
This reaction is a single replacementreaction in which the most reactive elements displaces the least reactive element from its solution.