Surface chemistry Questions and Answers

carbon chlorine carbon dioxide copper calcium carbon chlorine copper hydrogen mercury oxygen sodium zinc I Mixtures A Heterogeneous mixtures 1 2 3 Elements Organize information about mixtures in the outline below 4 Examples B Homogeneous mixtures 1 2 3 mercury oxygen 4 Examples water salt sodium sugar Compour sugar carbon dioxide

Change 1 Change 1 is impossible a physical change a chemical change Sample of Substance X Change 2 Change 2 is impossible a physical change a chemical change Change 3 Change 3 is impossible a physical change a chemical change X S

Give an example of a liquid solid suspension

Is the following mixture is a solution or a suspension colloid Gold mercury amalgam Solution O Suspension Colloid

Is the following mixture is a solution or a suspension colloid Vodka O Solution Suspension Colloid C

23 Which of the following accurately describes a soap molecule a Can only mix with polar compounds b Only mixes with nonpolar compounds c Soap can mix with both polar and nonpolar compounds d d Cannot mix with either polar or nonpolar compounds Sub 016

5 a C b A solid bre c Individual ions join together to form a so d Spectator ions form a precipitate Which of the following pictures show dissociation BEFORE 8 BEFORE AFTER AFTER b d BEFORE Before AFTER After 00

ons Give a definition or description for the following term Precipitation reaction 10 bo

3 Would you expect the van der Waals interaction between two spherical water droplets in air and two air bubbles in water to be the same if all the spheres are of identical size Explain your answer

Choose which reaction will occur at the fastest rate A 5 0 grams of copper metal in 0 50M HNO3 5 0 grams of copper metal in 0 10M HNO3

Pick the odd one out. Stirring Increase in surface area Increase in pressure Decrease in temperature

Calcium and magnesium ion from a 105 litre sample of hard water was quantitatively precipitated as carbonates and weight of ppt obtained was found to be 568 g. Precipitate lost 264 g of weight on strong heating (A) Degree of hardness of water is 4 ppm (B) Molarity of Ca2+ ions in hard water was 4 x 10-5 M (C) Molarity of Mg2+ ions in hard water was 4 x 10-5 M (D) Sum of molarity of Ca2+ and Mg2+ ions in hard water was 6 x 10-5 M

A substance has a higher temperature when its particles have a higher average kinetic energy. Imagine two different substances that are both pure, meaning they each contain only on type of matter. Each substance has a different temperature. Which two properties determine which substance has the higher temperature?

9) Show the correct link according to description on the right: a) Hypotonic b) Isotonic c) Suspension d) Osmosis e) Dialysis f) Solution Solution has a lower solute concentration as the concentration inside the blood cells (1 point) A homogeneous mixture made up of very small size molecules or ions. Passage of water molecules through a semi-permeable membrane from a solution containing a lower salt concentration to a solution containing a higher salt concentration Small molecules and ions pass through a semi-permeable membrane while large macromolecules are held back Heterogeneous mixture with very large and heavy particles that tend to settle down on the bottom of the container. Solution has the same solute concentration as the concentration inside the blood cells

If you added 35.5 ml of an HCl solution to 35.5 ml of an NaOH solution and the temperature increased from 25.5 °C to 36.5 °C how much heat transferred in this process? The density of the mixture is 1.00 g/ml.

Match the terms about analytical precipitations to their definitions. The adsorption, occlusion, or inclusion of impurities along with the desired analyte in a precipitate. The binding of impurities to the surface of a crystal. The inclusion or occlusion of impurities within a crystal. The process of letting a precipitate stand with the mother liquor to promote slow recrystallization. The process of breaking up of a precipitate upon washing with water in the absence of an electrolyte.