Three Lab Groups Carried Out an Experiment to Identify the Concentration

question 27

Multiple Choice

Three lab groups carried out an experiment to identify the concentration of sucrose in six solutions. Each unknown contained one of the following sucrose concentrations: 0.0 M, 0.2 M, 0.4 M, 0.6 M, 0.8 M, and 1.0 M. Cubes of sweet potato (1 cm3) were soaked for 24 hours in each solution and weighed to determine the change in mass. Each data entry represents the average of three sample replicates expressed as percent change in mass following a 24-hour soak in the unknown solutions.
$$\begin{array} { | l | l | l | l | } \hline \text { Unknown } & \begin{array} { l } \text { Percent change in } \\\text { mass }\end{array} & \begin{array} { l } \text { Percent change in } \\\text { mass }\end{array} & \text { Percent change in } \\\hline & \text { Graup 1 } & \text { Group 2 } & \text { Group 3 } \\\hline \text { A } & 6.6 & 7.8 & 7.5 \\\hline B & 3.1 & 3.7 & 2.9 \\\hline \mathrm { C } & - 2.7 & - 3.5 & - 2.5 \\\hline \mathrm { D } & 0.7 & 0.5 & 1.1 \\\hline \text { E } & - 11.6 & - 12.3 & - 12.6 \\\hline \text { F } & - 5.2 & - 6.2 & - 4.9 \\\hline\end{array}$$
Based on the data provided, the intracellular molarity of dissolved solutes in sweet potato cells is approximately ________.

• A) 0.2 M
• B) 0.4 M
• C) 0.6 M
• D) 0.8 M

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