Answers
Answer:
K⁺ and HPO₄²⁻ ions are present in K₂HPO₄
Explanation:
K₂HPO₄ consist of anion and cation such as HPO₄²⁻ and K⁺. We can see that the charge on HPO₄²⁻ is negative 2. Thus inroder to balance the charge and to neutral the compound two potassium ions are attached because the charge on one atom of potassium is K⁺.
Properties of K₂HPO₄ :
It is salt of phosphoric acid.
Its density is 2.44 g/cm³.
It is odourless compound.
It is white powder and soluble in water.
It is used in fertilizer because it provide phosphorus which is beneficial for the growth of plants.
It is also used as a additive in food.
It is inorganic compound and also used as buffering agent.
Final answer:
The correct ions present in K2HPO4 are K+, H+, and PO43-. Here, potassium (K+) ions, hydrogen (H+) ion and phosphate (PO43-) ion are released.
Explanation:
The compound K2HPO4 dissociates in water to form ions. The correct answer from your selection would be the first one. When K2HPO4 is added to water, it dissociates into its ions 'K+' (Potassium), 'H+' (Hydrogen) and 'PO43-' (Phosphate). So, the ions present in K2HPO4 are K+, H+ and PO43-. Please note that K2HPO4 is also called dipotassium hydrogen phosphate.
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Related Questions
What is an extensive property? *A property that changes if temperature changesA property that will NOT change if temperature changesA property that changes if the amount of substance changesA property that does NOT change if the amount of substance changesHelp :( pls
Salt, sugar, and snow are examples of ____________________ solids.
An element is to a __ as an organ is to a ___
Rank each of the following gases in order of increasing Urms assuming equivalent amounts and all gases are at the same temperature and pressure where 1 is the lowest Urms Gas 1: H2S Gas 2: He Gas 3: NF3 Gas 4: H20
Answers
The observation in this instance relates to the quantity of heat needed to melt ice, and it is expressed in terms of weights (2 lbs and 1 lb) and a comparison (twice the amount).
Without going into detail into the different molecules or their interactions, it concentrates on the general behaviour and characteristics of the substance (ice) as a whole.
A microscopic description, on the other hand, would describe the behaviour in terms of the molecular or atomic interactions that take place at the particle level. It would go into ideas such as the amount of heat required to dissolve the intermolecular interactions between water molecules.
Therefore, the observation regarding how much heat is needed to melt ice is a macroscopic description since it ignores the underlying molecular interactions in favour of the substance's general behaviour and qualities.
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The observation that melting 2 lbs of ice requires twice the heat of melting 1 lb is a macroscopic description, focusing on observable properties and behavior without exploring microscopic details.
This observation is a macroscopic description of chemical behavior. Macroscopic descriptions involve the properties and behavior of substances on a large scale that can be observed directly, without delving into the molecular or atomic details. In this case, the statement refers to the amount of heat required to melt a certain quantity of ice, and it is expressed in terms of macroscopic, measurable quantities (pounds of ice and the associated heat).
The macroscopic observation does not provide insight into the molecular or atomic interactions within the ice but rather focuses on the overall behavior of the substance. The concept that the amount of heat required to melt 2 lbs of ice is twice that needed for 1 lb of ice is a statement about the material's behavior at a larger scale.
This observation aligns with the macroscopic principles of heat and phase transitions, where the heat required for a phase change is directly proportional to the mass of the substance undergoing the transition. The macroscopic perspective is concerned with observable properties and measurements, making it a practical and accessible way to describe chemical behavior without delving into microscopic details.
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Answers
Answer:
Sublimation is basically cause by the heat absorption and this process is an endothermic since it require extra energy.
It basically provide sufficient energy to molecules to control the various type of attractive forces from the neighbors and then convert it into the vapor phase.
Sublimation occur when the particle of gases become cold because some substances has high vapor pressure. Sublimation is the endothermic change and it occur below the triple point in terms of pressure and temperature.
Answers
Answer:
Addition of some Na₂SO₄ (aq).
Explanation:
2NaHCO₃ (s) + H₂SO₄ (aq) ⇄ Na₂SO₄ (aq) + 2H₂O (l) + 2CO₂ (g)
According to the Le Chatelier's principle, the addition of Na₂SO₄ to the reaction would lead to shift to the direction of the reaction that consumes Na₂SO₄, in order to reestablish equilibrium. Since the reaction that consumes Na₂SO₄ is the reaction that produces H₂SO₄, the concentration of H₂SO₄ would increase.
Answers
Energy = mC(T2-T1)
Energy = 255(4.184)(12.5)
Energy = 13336.5 J
Answer: The amount of energy required to raise the temperature is 13323.75 joules.
Explanation :
The amount of energy required to raise the temperature can be calculated as follows.
where,
q = heat energy
m = mass of water
C = specific heat
T = temperature
Remember that the specific heat of water is .
Therefore, putting the values in the above equation as follows.
= 13323.75 joules
So, the amount of energy required to raise the temperature is 13323.75 joules.
Answers
Answer:
Solubility= 1.08×10-12
Explanation:
Take the cube root of 1.27×10-36
Answer:
The solubility of CuX is 1.425x10⁻⁷M
Explanation:
Given:
initial concentration of NaCN=0.2M
Ksp=1.27x10⁻³⁶
The reaction are:
CuX → Cu²⁺ + X²⁺, Ksp=1.27x10⁻³⁶
Cu²⁺ + 4CN⁻ → (Cu(CN)₄)²⁻, Kf=1x10²⁵
The overall reaction is:
CuX + 4CN⁻ → (Cu(CN)₄)²⁻ + X²⁺
The equilibrium constant is:
K=Ksp*Kf=1.27x10⁻³⁶*1x10²⁵=1.27x10⁻¹¹
CuX + 4CN⁻ → (Cu(CN)₄)²⁻ + X²⁺
I - 0.2 0 0
C - -4 +x +x
E - 0.2-4 x x
The equation for equilibrium is:
Here, solving for x:
x=1.425x10⁻⁷M=CuX
B. magnetism
C. electromagnetic force
D. gravity
Answers
Answer:
✨Gravity✨ hope this helps
Explanation: