Interpretation:
Is a 10% sodium hydroxide solution made by dissolving 10 grams of the solid in 100 mL of water, and if you should insisting to dissolve the 10 g of solid hydroxide in only 90 g of water is to be explained.
Concept Introduction:
% w/w (weight per weight) is used where the weight of each chemical is used and not the volume (example, If dissolve 10 g of fat in 90 g ethanol so the total mass of the whole solution is 100 g, then I have made a 10% w/w solution of fat).
% w/v (weight per volume) is used where a solid chemical is dissolved in liquid (example, if I dissolve 10 g of table salt, sodium chloride, to make up a total volume of 100 mL of solution then I have made a 10% w/v solution of sodium chloride)
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Chapter 2 Solutions
The Organic Chem Lab Survival Manual: A Student's Guide to Techniques
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- How are the boiling point and freezing point of water affected by the addition of solute?arrow_forwardUsing KF as an example, write equations that refer to Hsoln and Hhyd Lattice energy was defined in Chapter 3 as H for the reaction K+(g) + F (g) KF(s). Show how you would utilize Hesss law to calculate Hso1n from Hhyd and HLE for KF, where HLE = lattice energy. Hsoln for KF, as for other soluble ionic compounds, is a relatively small number. How can this be since Hhyd and HLE are relatively large negative numbers?arrow_forwardWhat happens if you add a very small amount of solid salt (NaCl) to each beaker described below? Include a statement comparing the amount of solid eventually found in the beaker with the amount you added: a a beaker containing saturated NaCl solution, b a beaker with unsaturated NaCl solution, c a beaker containing supersaturated NaCl solution. A saturated sodium chloride solution.arrow_forward
- Refer to Figure 13.10 ( Sec. 13-4b) to answer these questions. (a) Does a saturated solution occur when 65.0 g LiCl is present in 100 g H2O at 40 C? Explain your answer. (b) Consider a solution that contains 95.0 g LiCl in 100 g H2O at 40 C. Is the solution unsaturated, saturated, or supersaturated? Explain your answer. (c) Consider a solution that contains 50. g Li2SO4 in 200. g H2O at 50 C. Is this solution unsaturated, saturated, or supersaturated? Explain your answer. Figure 13.10 Solubility of ionic compounds versus temperature.arrow_forwardEvery pure substance has a definite and fixed set of physical and chemical properties. A solution is prepared by dissolving one pure substance in another. Is it reasonable to expect that the solution will also have a definite and fixed set of properties that are different from the properties of either component? Explain your answer.arrow_forwardIf all the solute is dissolved in diagram 1 (Figure 1), how would heating or cooling the solution cause each of the following changes? ct; Try Again; 3 attempts remaining in 2 of 2 blanks incorrectly. on the left to the appropriate blanks on the right to complete the sentences. Reset cooled 1. From diagram 2 to 1, the solution has been since most solid solutes are more lower soluble at temperatures. higher heated Figure 1 of 1 > Previous Answers Request Answer ct; Try Again; 4 attempts remaining in 2 of 2 blanks incorrectly. Solid 3arrow_forward
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