Reviewer Gen Chem 2 PDF

Reviewer Gen Chem 2 When solving for the equivalent weights of [acids], which of the following should be given consideration? a. The number of hydrogen atoms. b. The number of hydroxide molecules. c. The number of negative charges. d. The number of positive charges. A certain amount of suc...

Reviewer Gen Chem 2 When solving for the equivalent weights of [acids], which of the following should be given consideration? a. The number of hydrogen atoms. b. The number of hydroxide molecules. c. The number of negative charges. d. The number of positive charges. A certain amount of sucrose is added to water during the boiling process. What will be the expected result? a. b. The solution will boil quickly. c. There will be no change in the solution. d. The sucrose will evaporate. e. The water will boil longer than expected. Benzene, sugar and ethanol are compounds that have a van Hoff factor of 1. The reason for this is a. They have a small molecular mass. b. Their formulas are made of three (3) elements only. c. Their molecules do not dissociate when they are dissolved in a solvent. d. They have covalent bonds. Which of the following is the reason why salt is added to the ice surrounding the ice cream? a. Salt adds flavor to the ice cream. b. Salt prevents the ice surrounding the ice cream from melting. c. Salt lowers the freezing point causing the ice cream to freeze *slowly.* d. Salt lowers the freezing point causing the ice cream to freeze *quickly.* Which of the following is the reason why salt is added to the egg while boiling? a. It decreases the water temperature causing the eggs to cook faster. b. It destabilizes the temperature causing the eggs to cook slower. c. It increases the water temperature causing the eggs to cook faster. d. It stabilizes the water temperature causing the eggs to cook faster. Which of the following is the aim of titration? a. Measure the amount of solute and solvent. b. Measure the number of products produced. c. Measure the amount of catalysts needed for the reaction. d. Measure the concentration of unknown solution from a known one. Which of the following is expected to happen if heat is given off by the system? a. b. Internal energy will decrease. c. Internal energy will increase. d. Internal energy will be exhausted. e. Internal energy remains the same. a. When a catalyst is added to the reactants, the expected effect would be a. The reaction will be less exothermic. b. The reactants will mix more thoroughly. c. The activation energy will decrease causing the reaction to speed up. d. The reaction will be more exothermic causing the reaction to speed up. Which of the following statements is true? a. b. Gas can turn into solid through sublimation. c. Liquids [only] evaporate when they reach 100 °C. d. Solid objects will expand when exposed to heat. e. Milk flows faster than honey because it has more water than honey. A needle can float on water due to the water's \_\_\_\_\_\_\_\_\_\_\_\_\_ A needle placed into the water vertically will sink. The is due to a. b. The needle is heavy. c. The water is denser than the needle. d. The temperature of the needle breaks the water's cohesive forces. e. The point of the needle punctures the water surface and breaks surface tension. Plants get water through their roots which allows the transport of water against the pull of gravity. What property of water is shown in the situation? Water is a dipole molecule. A dipole means that the molecule has \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ At what moment does vapor pressure become constant? a. When the molecules of the liquid phase entered the gaseous phase. b. When the molecules of the gaseous phase returned to the liquid phase. c. When the boiling point is reached. d. When equilibrium happens among the molecules between the liquid phase and the gaseous phase. Which of the following molecular activities happens in all five stages of boiling? a. Increase in the kinetic energy of molecules. b. Entry of the water molecules to the gas phase. c. Appearance of bubbles beneath and top surface of water. d. Increase in the surface pressure between the molecules. The second stage of boiling is called crab eyes. In this stage, it is expected that\_\_\_\_\_\_\_\_\_ a. Wisps of steam are starting to appear. b. The water temperature is around 100 °C. c. The rising steam will make a slight noise. d. Bubbles will start steaming to the tops of the water surface. What property of solid makes it easy to make a clean cut on an onion? Which of the following is an example of a crystalline solid that is considered ductile? a. Copper b. c. Diamond d. Glass e. Rubber The amount of solute and solvent can affect the speed of reaction. This is due to a. Greater pressure is needed for the reaction to occur. b. More catalysts will lower the activation energy between the solvent and solute. c. A higher concentration of reactants leads to more molecular collisions per unit time. d. There is a need for a higher temperature to induce a reaction between the solvent and solute. Which of the following is the most accurate description of the effect of a catalyst? a. It speeds up the rate of reaction of the solution. b. It causes the reactants to mix thoroughly in the solution. c. It decreases the activation energy for the reaction by providing an alternative pathway for the reaction to occur. d. None of the above. Which of the following is an example of homogenous catalyst? a. Hydrochloric acid dissolved in water. b. Sodium chloride dissolved in water. c. Sugar and oil mixed with water. d. Vinegar and sugar dissolved in water Which of the following is the best description for heterogenous catalyst? a. It comes in the same phase as the reactants. b. It has one limitation which is the surface area. c. It is the catalyst of choice for the petroleum industry. d. It comes in a different phase as compared to the reactant The amount of solute and solvent can affect the speed of reaction. This is due to e. Greater pressure is needed for the reaction to occur. f. More catalysts will lower the activation energy between the solvent and solute. g. A higher concentration of reactants leads to more molecular collisions per unit time. h. There is a need for a higher temperature to induce a reaction between the solvent and solute. Which of the following is the most accurate description of the effect of a catalyst? e. It speeds up the rate of reaction of the solution. f. It causes the reactants to mix thoroughly in the solution. g. It decreases the activation energy for the reaction by providing an alternative pathway for the reaction to occur. h. All of the above. When a solid material is considered malleable, that material can be\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ If you put 2-3 drops of detergent into a cup of water, the floating needle will sink. What is the reason for this phenomenon? Which of the following is the aim of titration? e. Measure the amount of solute and solvent. f. Measure the number of products produced. g. Measure the amount of catalysts needed for the reaction. h. Measure the concentration of unknown solution from a known one. Which of the following is expected to happen if heat is given off by the system? f. g. Internal energy will decrease. h. Internal energy will increase. i. Internal energy will be exhausted. j. Internal energy remains the same.. Characteristic of spectator ions. a. b. They do not dissociate into separate molecules. c. They do not attach to other molecules. d. They do not participate in the reaction. e. Their amount remains the same. 140 grams of potassium chloride (KCl) is dissolved in 600 ml of water (H~2~O). What is the molarity of the solution? What is the concentration of a solution made by dissolving 5 grams of Iron (II) sulfate (**FeSO~4~**) in 75 grams of water? How many moles of Al are needed to form 3.7 mol of Al2O3? M8 **4Al + 3O2 → 2Al~2~O~3~** a. 1. If you start with 10.0 grams of LiOH, how many grams of LiBr will produced? **LiOH + HBr → LiBr + H~2~O** How many moles of potassium nitrate (KNO~3~) are produced when 2 moles of K~3~PO~4~ react with two moles of Al(NO~3~)~3~? Formula: **K~3~PO~4~ + Al(NO~3~)~3~ → 3 KNO~3~ + AlPO~4~** M9 How many of hydrogen are necessary to react completely with 50.0 g of nitrogen in the reaction? **N~2~ + 3 H~2~ → 2 NH~3~** How many moles of oxygen are necessary to react completely with four moles of propane (C3H8)? **C~3~H~8~ + 5O~2~ → 3 CO~2~ + 4H~2~O** If you start with 10 grams of lithium hydroxide (LiOH), how many grams of lithium bromide (LiBr) will be produced? **LiOH + HBr → LiBr + H~2~O** How many moles of **H~2~O** are produced with 20 moles of NH~3~? M9 **4NH₃ + 3O₂ → 2N₂ + 6H₂O** a. Which of the following electrolytes has the same value of van Hoff factor as that of K4\[Fe(CN)6\]? Starting with **5.5** grams of sodium fluoride (NaF), how many grams of magnesium fluoride will be produced? **Mg + 2 NaF → MgF~2~ + 2 Na** If the freezing point constant for carbon tetrachloride is 30. °C/m, how many grams of pyrazine (C~4~H~4~N~2~) would have to be dissolved in **2.50 kg** of carbon tetrachloride to lower the freezing point by **5.5 °C**? 300 Joules of heat is added to the system and 2500 joules of work is done by the system. What is the change in internal energy of the system? 2000 joules of heat are added to a system and 2500 joules of work is done on the system. What is the change in internal energy? a.