NaCl is dissolved in water, the temperature of the water slightly decreases. Use this fact to  explain why the salt NH4NO3 is used for instant cold packs.

Q: A 112-mg sample of Na2CO3 is dissolved in H2O to give 2.55 L of solution. What is the concentration…

A:

Q: CuSO4•5H2O is a hydrate.  What happens to the water molecules in the hydrate during a dehydration…

A: A dehydration reaction is a type of condensation reaction. During the process of the combination of…

Q: 100-g of MgSO4•7H2O is dissolved in 900 g of water. If the density of the solution is 1.047 g/mL,…

A: Given data,Mass of MgSO4.7H2O=100gMass of water=900gDensity of solution=1.047g/mL

Q: The concentration of sodium chloride in seawater is approximately 0.481 M NaCl.  How many grams of…

A: The molarity of a solution represents the number of mol of solute present in 1 L of the solution.…

Q: What is the reaction between sodium hydroxide and water? And why do you feel heat once you mix them…

A: Reaction between water and NaOH.  NaOH(s)  + H2O ---> NaOH(aq.)

Q: 7. Sodium chloride is dissolved in water as given in the choices. Which sólution is most…

A: Correct option is C.  6 g of NaCl dissolved in 5 g of H2O. Concentration is expressed in different…

Q: Why common salts such as sodium chloride (NaCl) and Calcium Chloride (CaC12) are preferred in cold…

A: CaCl2 is used to clear the snow from the roads in cold countries because it depresses the freezing…

Q: 1. Why is pure dry NaCl a non-conductor of electricity but when dissolved in water, a good conductor…

A: Conductors are those compounds which allow the flow of current or heat through them. Free electrons…

Q: Why doesn’t boiling eliminate nonvolatile contaminants such as lead?

A: The boiling point of a substance is the temperature at which the vapor pressure of a liquid equals…

Q: Calculate the heat of solution if 5.0 g of benzoic acid, C6H5COOH, is dissolved in 45.0 g of water…

A: Heat change of the reaction is measured as  q = m*c*∆T Where  m = mass of water (g) c = specific…

Q: A 116-mg sample of Na2CO3 is dissolved in H2O to give 2.05 L of solution. What is the concentration…

A: ppm( parts per million): It is one of the best methods to determine the concentrations of the…

Q: X19, Calculate the mass of oxygen (in mg) dissolved in a 5.00 L bucket of water exposed to a…

A: To solve this problem, we can use Henry's law, which states that the concentration of a gas in a…

Q: How many grams of KCl could dissolve in 100 g of water at 60 degrees Celcius?

A: How many grams of KCl could dissolve in 100 g of water at 60 degrees Celcius?

Q: The hydrate is not fully converted to the anhydrous form, which could be a source of mistake.…

A: In order to find the accurate value of an ionic compound's water ratio, the hydrated ionic compound…

Q: 3 g BaI2 is dissolved in 145.0 g of H2O. Calculate the percentage concentration (by mass) of BaI2.

A: Percentage concentration by mass = 100 x Mass of solute/mass of solution

Q: Why does sodium acetate form a supersaturated aqueous solution upon fast cooling? why is fast…

A: Supersaturated solution: A solution that contains more than the maximum quantity of solute that may…

Q: If the ΔHsolution ( KI )= 15 kJ/mol, ΔHhydration (K+) = -335 kJ/mol, and ΔHhydration (I-) = -293…

A:

Q: Calculate the expected change in temperature given the following data: 7.5 g of NH4NO3 dissolved in…

A:

Q: Like CO2, water has two polar bonds but unlike CO2, water is polar overall. Explain why this is so?

A: Since we know that the molecular geometry of CO2 is Linear  and H2O is bent .

Q: Which of the following has the highest ionic strength? Why? A.  0.025 mol/L Na2SO4 B.  0.025…

A: Ionic strength of the solution is defined as the electric intensity or the polarity of the solution…

Q: Calculate the theoretical percentage of water in CoCl3·4H2O (Molar mass of the hydrate is 237.37…

A: Given :- chemical formula of hydrate = CoCl3.4H2O  Molar mass of CoCl3.4H2O = 237.37 g/mol  To…

Q: Which ions are responsible for making water hard?

A: There are two types of water, based on the minerals present in the water. Hard water: Hard water…

Q: Explain why the amount of dissolved oxygen in a lake is often considered an indicator of the…

A: Dissolved oxygen (DO) is the amount of oxygen gas present in water. Running water has more amount of…

Q: Why aeration is important in water treatment? Why Coagulation as a chemical tool is important in…

A: Introduction :  Water treatment is a process of removing unwanted chemicals , pollutants from the…

Q: From its phase diagram, why do you think CO2 is called dry ice

A: Triple point of a substance can be defined as the temperature and pressure at which three phases of…

Q: Why is hard water undesirable for some households and industrial use. Explain the problem(s)…

A: Hard water is the most common problem found in home.Hardness producing ions are calcium and…

Q: A hydrate of calcium sulfate, CaSO4. XH2O contains 20.9% water, calculate the water of…

A: Introduction:  The hydrates of calcium sulfate are commonly known as calcium sulfate hydrates. These…

Q: Room temperature:   294.0 K Barometric pressure:   770.5 mmHg Vapor of water:   18.6 mmHg Volume of…

A: Given:% composition of H2O2 3.02 %.At STP,Temperature = 273.15 KGiven barometric pressure…

Q: Why are most solid ionic compounds electrically nonconductive, whereas aqueous solutions of ionic…

A: Electrical conductivity is due to the movement of ions. The flow of ions is responsible for…

Q: Suppose you are presented with a clear solution of sodium thiosulfate, Na2S2O3. How could you…

A: A solution is said to be saturated when it cannot dissolve any extra solute in it. A solution is…

Q: balanced chemical equation showing the reaction of hydrosulfuric acid with lithium hydroxide to form…

A: The given reaction of hydrosulfuric acid with lithium hydroxide to form water and lithium sulfide…

Q: based on the conductivity results of pure distilled water, does water exist predominantly as ions or…

A: As per the conductivity results of pure distilled water, it does not conduct electricity.

Q: Is CuSO4 soluable in water?

A: Most of the sulfate salts of metals are soluble in water.

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.