Electrolytes & pH

What is an electrolyte?

• A charged particle.

• A substance that dissociates into charged particles.

• A salt, base, or acid.

• A substance that allows an electric current to flow through a solution.

Tags

NGSS.HS-PS2-5

The ​ (a)   formed through​ (b)   allow an electric current to flow through a solution.

• ions
• electrolytic dissociation
• dissolution
• evaporation
• molecules
• elements
• sublimation

What am I?

• base

• I am a substance with a chemical formula that often begins with a metal and usually ends with an OH- group, and I make litmus paper turn blue.

• salt

• I am a substance produced by the bonding of a metalllic ion with a nonmetallic ion (other than H+ or OH- ions).

• salt

• I am usually made of a metal and one or more nonmetals, and I do not make limtus paper change colour.

• base

• I am a substance that release OH- ions in an aqueous solution, and my pH is higher than 7.

• acid

• I am a substance that releases H+ ions in an aqueous solution, and my pH is lower than 7.

Tags

NGSS.HS-PS1-1

What is pH?

• A property that can distinguishes acidic, basic and neutral solutions.

• A property used to determine the level of acid or base solutions.

• A logarithmic scale.

• A difference of 10x between pH 4 and pH 5.

The higher the pH of a solution, the more​ (a)   the solution and the lower the pH the more​ (b)   the solution.

• basic
• acidic

Put the following in order of increasing pH.

• Seawater

• Soap

• Rainwater

• Human Blood

• Soft Drink

Draw an electrical conductivity probe in a solution with NaCl. Draw arrows to indicate the movement of the ions.

Tags

NGSS.HS-PS2-5

NGSS.HS-PS3-5

Draw the dissolution of a sugar cube in water.

Tags

NGSS.5-PS1-1

NGSS.5-PS1-2

Which of the following are acids?

• HCl

• HCN

• HClO2

• NH3

• LiOH

Which of the following are bases?

• HCl

• HCN

• HCLO2

• NH3

• LiOH