D) the absence of charged molecules inside cells. Answer: C Page Ref: Section 3 11) The ________ pressure is the pressure required to prevent the flow of solvent through a solvent-permeable membrane that separates two solutions of different solute concentration. A) hydrostatic B) electromotive Answer: C Page Ref: Section 3 12 C) osmotic D) partial 12) Which is true about the solubility of electrolytes in water? A) They are all insoluble in water. B) They are usually only sparingly soluble in water.
The variable that affects osmotic pressure is You correctly answered: a. the concentration of nondiffusing solutes. 4. The net movement of water would be into the cell in a You correctly answered: b. hypotonic solution. page 1 Experiment Results Predict Question: Predict Question 1: What effect do you think increasing the Na+ Cl- concentration will have? Your answer : a. increased osmotic pressure Predict Question 2: What do you think will be the pressure result of the current experimental conditions?
The salts will be dissolved in distilled water by small quantities until the reaction reaches When ionic compounds dissolve in water, they either absorb energy from or release energy to the surroundings. If a chemical reaction absorbs heat from the surroundings, it is an endothermic reaction. If a solution releases heat to its surroundings, it is an exothermic reaction. The enthalpy of dissolution is the enthalpy change associated with the dissolution of a substance in a solvent at a constant pressure. The change in enthalpy relies on the concentration of the salt solution, because different concentrations will produce different enthalpies.
The concentration is measured in molarity. Molarity is the measure of moles of solute per liter of solution. The rate law helps one find solution's reaction order. If the reaction order is zero, the graphical representation is concentration vs. time, and the slope of the line is the negative rate constant. If the reaction is first order, its graphical representation is seen as ln[A] (natural log of concentration) vs. time, and the slope of its like is also the negative rate constant.
Lesson written by Carolina Sylvestri Experiment: Reaction Between Ions in Aqueous Solutions The Monster Mash Background: Ionic solids dissolve in water to form aqueous solutions which conduct electricity. These solutions contain both positive and negative ions in such numbers that their net electric charge is zero. In this experiment, you will mix various ionic solutions, two at a time, to determine which combinations form precipitates. Knowing which ions are present makes it possible to deduce which of the possible ion combinations are responsible for the precipitates. From your data table, it will then be possible to generate a solubility table.
EXPERIMENT 10: Solubility of Ionic Compounds Aim: How can we determine the solubility rules of ionic compounds? Materials: dropper bottles containing aqueous solutions of CaCl2, NaI , Na3PO4, AgNO3, CuSO4, NH4OH, , NaOH, and Na2CO3, plastic spot plates Introduction: A precipitation reaction occurs when two ionic compounds react in an aqueous solution to produce a precipitate, an insoluble (not soluble) substance which falls out of the solution. These reactions are a type of double-replacement, because the cations and anions of the reactants “change partners” in the products. For example: AgNO3 (aq) + NaOH (aq) ( AgOH (s) + NaNO3 (aq) According to Reference Table F, salts with hydroxide ions (OH-) are usually insoluble, and the silver ion (Ag+) is not an exception to this rule, so the AgOH that is formed will precipitate. However, in many instances, no precipitate forms because the recombination of ions yields only soluble compounds.
How do proteins associate with cell membrane? They associate as either peripheral or integral proteins. Associating as peripheral or integral depends on whether they are hydrophobic and can attach into the bilayer or hydrophilic and must stay on the outside of the bilayer via ionic interactions or H bonds. Integral proteins usually must be removed with detergents. How does the presence of cholesterol affect lipid
| | | | | | | | | | | | | 4) | | In the diffusion of water across a semipermeable membrane is called____________ | | | | | | | | | | | | | THE USE OF CARRIER PROTIENS FOR DIFFUSION IS CALLED ______________________ THE CONCENTRATION OF SOLUTES IN A(N) ____________________ EQUALS THE CONCENTRATION OF SOLUTES INSIDE OF THE CELLS THE MOVEMENT OF MOLECULES FROM TAN AREA OF HIGH CONCENTRATION TO AN AREA OF LOW CONCENTRATION IS ________________________ A(N) ____________________IS THE DIFFERENCE BETWEEN THE CONCENTRATION OF SOLUATES OUTSIDE THE CELL IS HIGHER THEN THE CONCENTRATION OF SOLUTES INSIDE THE CELLS. THE CONCENTRATION OF SOLUTES IN A _______________________________________________IS LOWER OUTSIDE the cell than the concentration of solutes inside the sell. A ___________________is the difference between the concentration of a particular molecule in one area and the concentration in an adjacent area. PEOPLE!!! 1 Robert Hook 2 Anton Van Leeuwenhoek 3 Matthias Schleidan 4 Theodor Schwann 5 Rudolf Virchow All animals are made up of
P1 POSSIBLE 6 MARKS QUESTIONS 1. A vacuum flask is designed to reduce the rate of energy transfer by heating process. Describe how the design of a vacuum flask keeps the liquid inside hot? • The plastic cap of the vacuum flask is a good insulator, so it reduces the heat transfer by conduction. It stops convection currents formed at the top of the flask thereby stopping convection.
The rate of water loss will impact both the efficinecy of the coating process and ultimately, product performance. Moisture can influence the properties of polymeric coatings. The aqueous film- coating process have the effects of water, due to the possible entrapment of water in the micro domains of the film. Moisture in a film coating reflects effect of plastisizer on the polymer31-33. 1.8.4.3.