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When mercuric iodide is added to an aqueous solution of potassium iodide freezing point is raised why?
Freezing point of the solution will increase. Mercuric Iodide will react with Potassium Iodide to form dipotassium tetraiodomercury. The reaction is given below :
2KI + HgI2 = K2[HgI4]
This association will decrease the number of ions in the solution as a result of which Van't Hoff Factor (i) will decrease as n decreases from 4 to 3.
Now, Freezing point depression when a solute is added to a solvent is given by ΔT = i Kf m
Clearly now i has decreased from when it was an aqueous KI solution to when HgI is added so ΔT is less now, hence less depression in freezing point which means a higher freezing point.
Hence the freezing point of solution will increase.
Note: Van't Hoff factor (i) =1+alpha(n-1) where alpha=dissociation degree and n is the no of ions dissociated
Hope you understand the reasoning behind it now.
What else can I help you with?
What is aqueous potassium nitrate?
Just potassium nitrate in water. Aqueous stands for anything with water, so if you take dry potassium nitrate and add some water to it until it dissolves, you have made an aqueous solution of potassium nitrate.
Why is an aqueous solution of potassium nitrate considered to be homogeneous?
Yes
What is the name of starch indicators solution?
It is the Iodine dissolved in aqueous Potassium(or Sodium) Iodide
How does the percentage by mass of the solute describe the concentration of an aqueous solution of potassium sulfate?
The percentage by mass of the solute in an aqueous solution of potassium sulfate indicates the mass of potassium sulfate present in a given mass of the solution. For example, a 10% by mass solution means that there are 10 grams of potassium sulfate for every 100 grams of solution. This measurement provides a clear indication of the concentration, allowing for comparisons between different solutions and helping in calculations for reactions or processes that require specific concentrations.
How does freezing point get calculated if boiling point of an aqueous solution is given?
You can calculate the freezing point of an aqueous solution using the equation for colligative properties: ΔTf = i * Kf * m, where ΔTf is the freezing point depression, i is the van 't Hoff factor, Kf is the cryoscopic constant of the solvent, and m is the molality of the solution. By rearranging the equation, you can solve for the freezing point.
Why does potassium chloride conduct electricity in aqueous solution?
Potassium chloride dissociates into ions (K+ and Cl-) in aqueous solution, allowing for the movement of charged particles. This movement of ions enables the flow of electricity, making potassium chloride a conductor in aqueous solution.
What is aqueous potassium nitrate?
Just potassium nitrate in water. Aqueous stands for anything with water, so if you take dry potassium nitrate and add some water to it until it dissolves, you have made an aqueous solution of potassium nitrate.
Why is an aqueous solution of potassium nitrate considered to be homogeneous?
Yes
How do you separate potassium chloride from aqueous potassium chloride?
One way to separate potassium chloride from aqueous potassium chloride is through evaporation. By heating the aqueous solution, the water will evaporate, leaving behind solid potassium chloride. Another method is through precipitation by adding a chemical that reacts with potassium ions to form a solid precipitate of potassium chloride that can then be filtered out from the solution.
How do you separate potassium chloride form aqueous potassium chloride?
You can separate solid potassium chloride from aqueous potassium chloride by processes like evaporation or crystallization. Simply heating the aqueous solution can evaporate the water and leave behind solid potassium chloride. Alternatively, you can allow the solution to cool slowly, causing potassium chloride crystals to form and separate from the liquid.
How can you rank aqueous solutions based on their freezing points?
Aqueous solutions can be ranked based on their freezing points by comparing the concentration of solutes in the solution. The more solutes present, the lower the freezing point of the solution. This is because the solutes disrupt the formation of ice crystals, preventing the solution from freezing at the normal temperature.
Why does an aqueous solution of iodine not react with potassium chloride?
Iodine is not reactive with potassium chloride in an aqueous solution because iodine is less reactive than chlorine. Chlorine is more likely to react with potassium to form potassium chloride, leaving the iodine unreacted.
Name one compound containing large anions which can be used for precipitation of potassium ions from aqueous solution?
Sodium tetraphenylborate (NaB(C6H5)4) is a compound containing large anions that can be used to precipitate potassium ions from aqueous solution. When added to a solution containing potassium ions, insoluble potassium tetraphenylborate precipitates out.
What is the freezing point of an aqueous solution if the boiling point of an aqueous solution is 101.34 degree Celsius?
The freezing point of an aqueous solution will be lower than 0°C (32°F) if the boiling point is elevated above 100°C. The freezing point depression is a colligative property dependent on the concentration of solute particles in the solution. To determine the specific freezing point, more information on the solute and its concentration is required.
A dilute aqueous potassium nitrate solution is best classified as a?
A dilute aqueous solution of potassium nitrate would be classified as an electrolyte due to the presence of potassium ions (K+) and nitrate ions (NO3-) that can conduct electricity when dissolved in water.
How to crystallize potassium nitrate from its aqueous solution?
To crystallize potassium nitrate from its aqueous solution, you can gradually heat the solution to evaporate the water until crystals start to form. Then, allow the solution to cool slowly to encourage crystal growth. Finally, filter the solution to separate the crystals from the remaining liquid.
What is the freezing point of potassium hydroxide?
48% KOH freezing pt -11deg C 45% KOH freezing point -28 deg C The change in freezing point (always a decrease) = (number of ions in solution per molecule) x (Kf - the freezing point constant of the solvent) x (m - the molality of the solution, i. e. moles solute per kg solvent) For KOH in water, Freezing pt = 0 - 2(1.86)(molality of solution)
