Answer:
0.075 m solution has the lowest freezing point.
Explanation:
Depression in freezing point is given by:
where,
=Depression in freezing point
= Freezing point constant of solvent
1 - van't Hoff factor
m = molality
According question, molality of all the solutions are same and are in prepared with same solvent. So, values of molality and will remain the same and will not effect the freezing point of the solution.
The lowering in freezing point will now depend upon van't Hoff factors of the solutions. Higher the value of van'Hoff factor more will be the lowering in freezing point of the solution.
The van't Hoff factor of 
solution = 
The van't Hoff factor of 
solution = 
The van't Hoff factor of solution = 
The van't Hoff factor of 
solution = 
The van't Hoff factor of 
solution = 
The solution of ammonium phosphate has the highest values of van't Hoff factor which will result in maximum lowering of the freezing point of the solution.
Hence, 0.075 m solution has the lowest freezing point.
Answer:
ionic compound
Explanation:
ionic bonding
In ionic bonding, electrons are completely transferred from one atom to another. In ionic bonding, electrons are completely transferred from one atom to another. In the process of either losing or gaining negatively charged electrons, the reacting atoms form ions.
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The answer is: K is more reactive than Ca because K has to lose only one electron to complete its outermost shell.
Potassium is a chemical element with atomic number 19 (number of electrons is 19).
Electron configuration of potassium is: ₁₉K 1s²2s²2p⁶3s²3p⁶4s¹.
Potassium is the alkali metal and has a single valence electron in the outer electron shell.
Periodic law is the arrangement of the elements in order of increasing atomic number.
For example all alkaline metals (I group of periodic table, Na, K, Cs...) loose one electron in chemical reaction and react vigorously with water.
Reactivity series is an empirical progression of a series of metals, arranged by their reactivity from highest to lowest (alkaline metals have highest reactivity and Noble metals lowest reactivity).
The ionization energy (Ei) is the minimum amount of energy required to remove the valence electron, when element lose electrons, oxidation number of element grows (oxidation process).
Alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons (one electron, earth alkaline metals (right next to alkaline metals) have higher ionization energy than alkaline metals, because they have two valence electrons.
-Just look up “H2O lewis structure
-1.5
-Don’t know the VSEPR
-Polar Covalent
-Again, don’t know VSEPR
-Just look up H2O molecule
To answer your question, the answer is number 1. hope this help
