Water Potential

Pure water has a water potential of ___.

• 1
• 0
• -1
• 100

Carrot and potato cores were placed in various sucrose solutions for 24 hours and the % change in mass was recorded and graphed.  The temperature in the room was 24 degrees celcius.  Identify the approximate concentration of sucrose in the potato cells.

• 0.13 M
• 0.0 M
• 0.4 M
• 0.33 M

Tags

NGSS.HS-LS2-4

Carrot and potato cores were placed in various sucrose solutions for 24 hours and the % change in mass was recorded and graphed.  The temperature in the room was 24 degrees celcius.  Sucrose is too large of a molecule to cross the membrane of potato and carrot cells.  Which molecule caused the change in mass?

• water
• sucrose
• salt
• glucose

Carrot and potato cores were placed in various sucrose solutions for 24 hours and the % change in mass was recorded and graphed.  The temperature in the room was 24 degrees celcius.  Sucrose is too large of a molecule to cross the membrane of potato and carrot cells.  Which of the following concentrations was NOT hypertonic to the carrot cells?

• 0.2 M
• 0.4 M
• 0.6 M
• 1.0 M

Tags

NGSS.HS-LS2-4

NGSS.HS-PS1-5

Carrot and potato cores were placed in various sucrose solutions for 24 hours and the % change in mass was recorded and graphed.  The temperature in the room was 24 degrees celcius.  Sucrose is too large of a molecule to cross the membrane of potato and carrot cells.  Calculate the water potential for the carrot cells.  The ionization constant for sucrose is 1.0 M.  The pressure potential is 0.

• -8.1 bars
• -8.1 M
• 8.1 bars
• -3.5 bars

Tags

NGSS.HS-LS2-4

A sucrose solution in a beaker has a solute potential of -4 bars.  A cell with a solute potential of -2 bars is placed in the beaker.  What is the pressure potential of the cell before it was placed in the beaker?

• 0 bars
• 2 bars
• -2 bars
• -4 bars

A sucrose solution in a beaker has a solute potential of -4 bars.  A cell with a solute potential of -2 bars is placed in the beaker.  What is the water potential of the cell before it was placed in the beaker?

• 0 bars
• 2 bars
• -2 bars
• -4 bars

A sucrose solution in a beaker has a solute potential of -4 bars.  A cell with a solute potential of -2 bars is placed in the beaker.  What is the water potential of the solution in the beaker?

• 0 bars
• 4 bars
• -2 bars
• -4 bars

A sucrose solution in a beaker has a solute potential of -4 bars.  A cell with a solute potential of -2 bars is placed in the beaker.  What will be the direction for the net movement of water?

• into the cell
• out of the cell
• there will be no net movement

What is the approximate sucrose concentration in the potato core?

• .43 M
• .30 M
• 0.0 M
• 1.0 M

Tags

NGSS.HS-PS1-5