Q: What do buffers do and why are they important in biological systems?
A:
Q: What happens when a pressure greater than the atmospheric pressure is applied to pure water or a…
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Q: What is the difference between solids, liquids, and gases?
A: The distinct forms in which the matter exists are known as states of matter. The three most…
Q: What are Ionic interactions?
A: Electrostatic attraction is the attraction between atoms that have opposite charges. There are four…
Q: What factors determine how quickly particles can reach equilibrium?
A: Chemical reactions are referred to as equilibrium reactions. Equilibrium occurs when there is a…
Q: What determines a molecule’s solubility or lack of solubility inwater?
A: Solubility is defined as the property of different substances ( including, solid, liquid, gas) known…
Q: Which of the following represents a Buffer solution?
A: Buffer solution can be defined as the solution which resists changes in pH when acid or alkali is…
Q: Which pH values are considered acidic, basic, and neutral?
A: pH scale indicates the hydrogen ion concentration of that solution. By given pH we can say if that…
Q: Define buffer.
A: An aqueous solution that comprises of a weak acid and its conjugate base's mixture or a weak base…
Q: What does the term intracellular fluid refer to?
A: Intracellular fluid is the cytosol found in the cell. Extracellular fluid Is present around the…
Q: What is the role of a buffer in living organisms?
A: Homeostasis is a kind of "self-regulating" process by which the biological systems maintain their…
Q: Which property of water allows it to dissolve substances like sodium chloride and glucose but…
A: Water is sometimes called as universal solvent. Interaction of water differs for charged and polar…
Q: Why liquid is more difficult to move than air?
A: Ans: Liquid: It is defined as an incompressible fluid that takes shape of its container. Air: The…
Q: What important role do buffers play in organisms? What prevents a strong acid or strong base from…
A: Introduction: Acid-base balance is a mechanism that the body employs to maintain the pH of the body…
Q: What are ions? What are the two types of molecules into which ions are classified?
A: Homeostasis is the mechanism in which a constant equilibrium is maintained between the two systems.…
Q: What are the physical properties of water of physiological importance? Explain
A: Water is a universal solvent with chemical formula H2O which is made up of 2 hydrogen atoms and one…
Q: What is meant by ph?
A: pH is abbreviated as the power of hydrogen or potential of hydrogen.
Q: What two quantities are being compared in the graph?
A: HIV or the human immunodeficiency viruses is a type of Lentivirus (a subgroup of the retrovirus,…
Q: what is a hydration number
A: Hydration refers to the interaction of a molecule or substance with water. Water interacts with…
Q: How does an electrolyte differ from a nonelectrolyte?
A: Electrolytes and nonelectrolytes are classified on the basis of conductive nature ( ability to…
Q: What are buffers and why is it important in biochemistry?
A: Any solution that resists the change in acidity and basicity of the solution. It helps in…
Q: . What are standard states?
A: Thermodynamics is a branch of physics and chemistry that deals with heat, work, and temperature, and…
Q: How do buffers work?
A: Buffers are the solutions which resist the change in pH even after the addition of small amount of…
Q: What is the pH of the solution?
A: pH is the negative logarithm of the concentration of hydrogen ion (H+ ) in a liquid.it is used to…
Q: Distinguish between heterogeneous and homogeneous mixtures and between solutions and colloids.
A: A mixture is a combination of two or more substances which are physically combined but not…
Q: Two solutions with equal osmotic pressures are
A: Osmosis is the process of diffusion of solvent from the region of higher concentration of solute to…
Q: What is the fluid mosacic model?
A: The fluid mosaic model explains the structure of the cell membranes. According to this model, cell…
Q: pH represents the:
A: Answer - pH stands for potential of hydrogen and it is calculated as negative logarithm of hydrogen…
Q: What Are Buffers, and What Do They Do?
A: Buffers : A buffer is a solution of a weak acid and its conjugate base that has the ability to…
Q: How is the molality of a solution different from its molarity?
A: A solution is composed of solute and solvent. The relative amount of solute and solvent present in a…
Q: What is the effect of adding a small amount of a strong acid or strong base to the acidity of a…
A: Acids are substances that are capable of donating hydrogen to other substances. Acids are also…
Q: What do you mean by extracellular fluid?
A: Given: What do you mean by extracellular fluid?
Q: What are the features of acids, bases, and salts that cause scientists to refer to them as…
A: Water is a polar compound that forms the base of all fluids in the world. This compound is made of…
Q: What is an isotonic solution?
A: Tonicity is the capacity of an extracellular solution to enable water to move into or out of a cell…
Q: What is concentration?
A: In biology, we measure some of substances. Also, perform various tests where we prepare various…
Q: Why is table salt, sodium chloride, almost never considered as an ionic compound, but as individual…
A: The salt that is most essential for the brackishness of seas and is also the major component of the…
Q: A solution that is described by the term hypertonic means that it is
A: Hypertonic and hypotonic are relative terms. To explain these terms two solutions are required.
Q: What do you mean by isotonic solution?
A: Tonicity is a measure of the effective osmotic pressure gradient. The water potential of two…
Q: What compounds tend to be non-electrolytes? What are the exceptions?
A: A substance that dissolves in water is classified according to whether they yield molecules or ions…
What is meant by the term “two-dimensional fluid”?
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- If the pH of a voledronic acid solution is 5.8, and the voledronate concentration is 9 mM, what is the concentration of voledronic acid? (pKa=5.0) 1.4 0.5 185.2 20 379.5What is the fluid mosacic model?pH expresses the molar concentration of hydronium ions in an aqueous solution on a logarithmic scale. (Note that it is common to use the hydrogen ion, H*, to represent the hydronium ion, H3O+.) pH = -log[H3O+] [H3O+] = 10-PH As pH decreases, acidity increases. As pH increases, acidity decreases. • Acidic solution: pH 7 Part A - Calculating pH Submit [H₂0+] 1 Acidic pH 01 10¹ 102 103 104 105 106 107 108 109 10-10 10-11 10-12 10-13 10-14 stomach acid 3 wine lemon tomatoes juice vinegar, black soft drinks, coffee beer 6 Neutral urine milk 7 human blood pure water sea- water baking soda 10 11 12 13 14 milk of magnesia house- hold ammonia oven cleaner Basic household bleach Adapted from Biological Science by Freeman ©2008 Pearson Education, Inc. What is the pH of an aqueous solution with the hydronium ion concentration [H3O+] = 2 x 10-14 M? Make sure that your answer has the correct number of significant figures. For help determining the correct number of significant figures, see Hint 3. ►…
- Calculate the molarity (M) of a 46% (w/v) copper sulfate solution (m.w. = 160.0 g/mol).What is the chemistry principle behind when (treatment: heavy cream) is subjected to CHILLED TEMPERATURE? What is the effect in beating time, stability (%drain) and volume foam (specific gravity) is important? see the data below Treatment (Heavy Cream) Beating Time (min) Stability (%drain) Volume of Foam (Specific Gravity) (Room Temperature) 20 No drain 0.94 Heavy Cream (chilled) 20 No drain 0.76 Heavy Cream with sugar and vanilla 20 No drain 0.88 Heavy Cream (over-whipped) 25 No drain 0.83A Vitamin C packet is added to a glass of water containing 620.0 mL of water. The Vitamin C packet contains 1000.0 mg of Vitamin C. What is the concentration of Vitamin C in ppm in the resultant solution? (density of water = 1.00 g/mL)
- When 2.43 g of a nonelectrolyte solute is dissolved in water to make 435 mL of solution at 25 °C, the solution exerts an osmotic pressure of 895 torr. What is the molar concentration of the solution? concentration: 0.045 M Incorrect How many moles of solute are in the solution? moles of solute: 0.034 mol Incorrect What is the molar mass of the solute? molar mass: 69.12 g/mol IncorrectIf the osmotic pressure of a 7.96×10-2-M aqueous solution of Fe2(SO4)3 was found to be 8.71 atm at 20°C, what would be the "observed" van't Hoff factor? Use the above van't Hoff factor to predict the freezing point of this solution.Note that the corresponding molality would be 8.25×10-2 m, given that the density of the solution is 0.997 g/cm3. °C Use the above van't Hoff factor to predict by how many degrees the boiling point of this solution will be elevated above that for pure water.Calculate the hydrogen ion concentration, [H+], for each of the following materials: (a) Blood plasma, pH 7.4 (b) Orange juice, pH 3.5 (c) Human urine, pH 6.2 (d) Household ammonia, pH 11.5 (e) Gastric juice, pH 1.8