1 answer

Which of the following statements is true (You can select multiple answers if you think so) Your answer: Actual yield

Question:

Which of the following statements is true (You can select multiple answers if you think so) Your answer: Actual yield is calculated experimentally and gives an idea about the succeed of an experiment when compared to theoretical yield: In acid base titration experiment; our scope is finding unknown concentration of an acid or base: In the coffee cup experiment; energy change is identified when the indicator changes its colour: Pycnometer bottle has special design with capillary hole through the stopper which enables air bubbles t0 escape from the bottle in order to fill same volume of the liquid into the bottle in every fill When you want to determine melting point of a solid in the laboratory; the colour of the solid changes and temperature is constant in the melting point: The reason of dropping "water+alcohol" solution into the heating beaker in saponification is preventing the bubbles flowing out of the beaker


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Determine whether each of the following statements is true or false: a) The concentration is the same throughout a beaker of solution. b) A saturated solution of solute $A$ is always more concentrated than an unsaturated solution of solute B. c) A solution can never have a concentration greater than its solubility at a given temperature. d) A finely divided solute dissolves faster because more surface area is exposed to the solvent. e) Stirring a solution increases the rate of crystallization.

F) Crystallization ceases when equilibrium is reached. g) All solubilities increase at higher temperatures. h) Increasing air pressure over water increases the solubility of nitrogen in the water. i) An ionic solute is more likely to dissolve in a nonpolar solvent than in a polar solvent. j) (Optional) The molarity of a solution changes slightly with temperature, but the molality does not.

K) (Optional) If an acid and a base react on a two-to-one mole ratio, there are twice as many equivalents of acid as there are of base in the reaction. I) The concentration of a primary standard is found by titration. m) Colligative properties of a solution are independent of the kinds of solute particles, but they are dependent on particle concentration.

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