If 7.5 g of KBr were dissolved in 100. g of water, how much heat (kJ) was involved? (2 Significant Figures)

Q: A substance has a solubility of 12.5 g per 100 mL of solvent at 100°C and 2.45 g per 100 mL solvent…

A: Given, At 100°C Solubility of of substance is 12.5 g per 100 mL of solvent At 10°C Solubility of of…

Q: KNO KCI NaCk 20 40 60 80 100 Temperature (°C) Grams of solute dissolved in 100 g of water

A: The given graph is :

Q: Data Table 2: The Heat of Solution for Calcium Chloride and Ammonium Chloride Calcium Chloride…

A: Concept - The heat capacity is the quantity of heat absorbed by the system for each 1°C rise in…

Q: A solution is 12.3% ethanol in water.If the solution has 75.0 mL of water, how many of ethanol do…

A: Applying concept of percentage.

Q: A saline solution contains 1.1% NaCl by mass. How much NaCl is present in 96.3 g of this solution?

A:

Q: How many grams of sucrose would you add to water to make a total of 1.5 L of 8% solution

A:

Q: If you dissolve 3 units of calcium hydroxide, how many particles are in the solution?

A: Compounds when dissolved in water dissociate into its corresponding ions. The solubility of…

Q: Which of the following is true about enthalpy changes when a salt dissolves in water? if the…

A: Enthalpy of the reaction changes when heat is absorbed or released from the reaction.

Q: The boiling point of a solution of 250 g benzene and 45g solute boils at 90. what is the MM of the…

A: Given : Mass of solute = 45 g Mass of solvent = 250 g Change in temperature (∆Tb) = 90 K

Q: How much heat, in joules and in calories, must be removed from 1.75 mol of water to lower its…

A:

Q: A chemist has 36.0 g of sucrose in a beaker. How many grams of water must be added to make a 9.80…

A: Given, Mass of sucrose = 36.0g

Q: Draw a more accurate representation of one unit of KCl dissolved in water

A: When potassium chloride (KCl) dissolves in water, it gets dissociated into potassium and chloride…

Q: Suppose 4.1 g MgCl2 is dissolved in 660 mL of water. What is the normality of Mg2+ ions in the…

A: Normality is the number of equivalents of solute per unit volume of the solution. Equivalent mass is…

Q: If KNO3 has a solubility of 31.6 g in 100. g of H2O at 20 ∘C, how many grams of water are needed to…

A: The maximum mass of solute that can be dissolved in the given amount of the solvent is known as…

Q: Assume that 5.95 g of benzoic acid dissolves in hot water. 8.88 g of benzoic acid are added to 100…

A: The amount of benzoic acid that gets dissolved in hot water is provided.

Q: Choose the most suitable definition for "enthalpy of solution". Select one: O a. The quantity of…

A: The enthalpy of solution, enthalpy of dissolution, or heat of solution is the enthalpy change…

Q: Intravenous fluid or electrolytes are usually reported in mEq/L. For example, a dialysate solution…

A: Given: Concentration of  Na+ =  130 mEqL-1 Concentration of Ca2+ =  5.0 mEqL-1 We know that,…

Q: Which of the following is true about enthalpy changes when a salt dissolves in water? a) if the…

A: To solve this problem we have to know about the enthalpy change of resulting solution made by…

Q: 2. The process of formation of a liquid solution can be better understood by breaking the process…

A: Given: Process of formation of a liquid solution that can be better understood by breaking the…

Q: 6. Suppose you start with 100 mL of a 5% (5g/dL) sucrose solution and dilute it by adding 300 mL of…

A: The question is based on the concept of mass percentage.   amount of substance present in hundred…

Q: How many grams of CaCl2 are needed to make 716.9 g of a solution that is 28.0% (m/m) CaCl2 in water?…

A: The solution's percentage concentration (m/m) gives the percentage of the mass of solute dissolved…

Q: A chemist dissolves 532. mg of pure barium hydroxide in enough water to make up 70. mL of solution.…

A: POH= - Log[OH-] [OH-]= Concentration of hydroxide ion

Q: During product recovery and washing, sodium carbonate is required to neutralize the acid present. If…

A: Given data: ℅ w/v =10 ℅ The volume of the solution = 15.80 ml

Q: How many grams of CaCl2 are needed to make 388.8 g of a solution that is 34.0% (m/m) CaCl2 in water?…

A:

Q: I have 24 grams of water and 48 grams of ethanol. Which one would be a solute.

A: Number of moles of water available = given mass/ molar mass =24 g / 18 g/mole = 1.3 mole Number of…

Q: Choose the most suitable definition for "enthalpy of solution". Select one: O a. The quantity of…

A: Enthalpy of solution also known as heat of solution.

Q: Saline solution contains 0.92% (w/v) NaCl in water. How many grams of NaCl are contained in 533 mL…

A: Given, Percentage of NaCl solution = 0.92%  Volume of the solution = 533 mL mass of NaCl = ?

Q: Calculate the heat energy in kcal evolved as 7.58 L of water freezes at 0.0°C.

A: We will calculate heat in Kcal

Q: 100-g of 85.0% by mass potassium hydroxide is dissolved to make a 500-mL  solution. What is the…

A:

Q: In which scenario is water the solvent? a. Seven drops of water added to 27.5 g of salt b. 12.8 mL…

A: Given, which scenario, water act as solvent?

Q: The heat of solution (A H is the algebraic sum of the heat of mixing (A H the heat of solvent (A H…

A: Thermodynamics is the branch of chemistry which deals with the study of heat and other forms of…

Q: if the solubility of potassium chromate is 62.4 g per 100 g of water if i had 602 mL of water…

A:

Q: The solubility of potassium nitrate is 155 g per 100 g of water at 75°C and 38.0 g at 25°C. What…

A:

Q: In the illustration, N is color-coded as blue and H is color-coded as white. What kind of change is…

A: There are two types of changes that can occur :  Physical Changes Chemical changes Physical…

Q: A sample of 0.892 g of potassium chloride (KCl) is dissolved in 54.6 g of water. What is the percent…

A: The percent by mass defines the percentage of each element that participates chemically in the…

Q: How many grams of NaCl is present in 100mL of salt water and 70g of water? The salt water density is…

A: Mass of solution = volume of solution x density of solution = 100 mL x 1.08 g/mL…

Q: Why do you think the dissolving of some salts in water are Exothermic and others are Endothermic?

A: We know that, dissolving of salts in water it is a chemical reaction. When chemical reaction or…

Q: When making a solution, the container gets hot. This is an example of an endothermic process O…

A:

Q: Q3- For solution of Sodium carbonate Na2Co3 , determine: a. The Molarity and Normality of 3 L of a…

A: Molarity = number of moles of solute/Volume of                       solution in L Number of moles =…

Q: A solution is prepared by dissolving 12.5 g of KBr in 20 mL of water at 60 °C(see Figure 9.3). Is…

A: Solubility of any substance means the mixing of one component into the other component. If the…

Q: Joules Using the data below, calculate the heat of dissolution, AHsoln, in units of g NaOH Assume…

A: Determination of change in temperature: ∆T=37.7°C-25°C=12.7°C

Q: How many grams of Na Cl would need to be added to 318.00 grams of water to lower the freezing point…

A: Given: Mass of water = 318.00 g = 0.318 Kg                                   (Since 1 Kg = 1000 g)…

Q: A patient received 1.8 g of NaCl in 8 hours. How many milliliters of a 0.91% (m/v) NaCl (saline)…

A: Given, 0.91% (m/v) NaCl 1.8 g of NaCl in 8 hours

Q: At 20 C, KCl has a solubility of 34 g KCl in 100mL of water. How much KCl can be dissolved in 356 mL…

A: Solubility is defined as the maximum quantity of a solute which can be dissolved at a particular…

Q: How many grams of pure water must be added to 40 grams of a 10% saline solution to make a saline…

A: The number of  grams of pure water must be added to 40 grams of a 10% saline solution to make a…

Q: A standard crank ice cream maker uses a mixture of ice water and salt to cool ice cream mix to the…

A:

Q: A chemistry student needs 20.0 g of thiophene for an experiment. She has available 1.5 kg of a 6.84%…

A: GivenConcentration of solution = 6.84 % w/wMass of available solution = 1.5 kg = 1500 gMas of…

Q: You have 100. g of a solution that is 12% KCl by mass. How many grams of KCl are in the solution?

A:

Q: A 70.0% alcohol solution is used as an antiseptic to clean hoods in microbiology labs. What volume…

A: Given information:70% alcohol solution (70 g solute in 100 mL of solution)