Analyze the results for the concentration of salts shown in Table 1.1.

Four salt solutions are created using different amounts of salt and water, as shown.Solution Salt(tablespoon) Water(mL)P 2 200Q 2 100R 1 200S 1 100Which solution has the highest concentration, and why?ResponsesSolution P; it has more salt and water compared to the other solutions.Solution P; it has more salt and water compared to the other solutions.Solution Q; it has more salt with a smaller amount of water compared to the other solutions.Solution Q; it has more salt with a smaller amount of water compared to the other solutions.Solution R; it has less salt with a larger amount of water compared to the other solutions.Solution R; it has less salt with a larger amount of water compared to the other solutions.Solution S; it has less salt and water compared to the other solutions.

Suppose 3.13g of potassium chloride KCl are dissolved in 500.mL of water. Find the composition of the resulting electrolyte solution.In particular, list the chemical symbols (including any charge) of each dissolved ion in the table below. List only one ion per row.Then, calculate the concentration of each ion in mEqL, and write the concentration in the second column of each row. Be sure you round your answers to the correct number of significant digits.

b) The table below shows the scientists’ results.Concentration of salt in arbitrary units Mass of 10 lugworms at start in grams Mass of 10 lugworms after 8 hours in grams Change in mass in grams Percentage (%) change in mass 1.041.2 61.8 +20.6+50 2.037.5 45.0 +7.53.055.0 56.1 +1.1+2 4.046.2 22.2 -24.0-52 5.045.3 22.6 -22.7-50 (i) The scientists calculated the percentage change in mass at each salt concentration. Why is the percentage change in mass more useful than just the change in mass in grams? Use information from the table in your answer. ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ (2) (ii) Calculate the percentage change in mass for the 10 lugworms in the salt solution with a concentration of 2.0 arbitrary units. ______________________________________________________________ ______________________________________________________________ Percentage change in mass = ______________________ % (2) Page 10 of 18because it allows for a fair comparison of how the lungworms were affected by the different concentrations of salt as you cannot compare change in mass as it would be relative to the size of the lungworm so by using percentage chang ein mass you can compare the change in mass of each indiviual worm(7.5 / 37.5) * 100 = 20% 20(c) (i) On the graph paper below, draw a graph to show the scientists’ results: • plot the percentage change in mass • label the horizontal axis • draw a line of best fit.(4) (ii) The scientists thought one of their results was anomalous. Draw a ring around the anomalous result on your graph. (1) (iii) Suggest what might have happened to cause this anomalous result. ______________________________________________________________ ______________________________________________________________ (1) Page 11 of 18(d) (i) What do you think is the concentration of salts in the lugworm’s natural environment? Use information from your graph to give the reason for your answer. Concentration = ______________________ % Reason _______________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ (2) (ii) The mass of the lugworms decreased in the salt solution with a concentration of 5.0 arbitrary units. Explain what caused this. ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ (3)

Interpret the data and describe the results for each metal and aqueous salt solution using scientific reasoning.

The concentration of solute in a solution that contains 0.900 g of sodium chloride in 100 mL is __________ M.*1 point0.00990.01540.1540.000154