Preparing Solutions

In a salt water solution, the water is the _____.

• solute

• solvent

• mixture

• suspension

A student is trying to dissolve sugar in water. Which of these would not help the sugar dissolve faster?

• stirring the sugar into the water

• heating the water

• freezing the water

• using a spoonful of sugar instead of a sugar cube

Tags

NGSS.MS-PS1-4

When dissolved in water, which ions do acids produce an excess of?

• H⁺

• H

• OH^-

• H^-

When dissolved in water, which ions do alkalis produce an excess of?

• H+

• H

• OH^-

• H^-

Tags

NGSS.MS-PS1-1

Mass of substance dissolved / volume of solution = ?

• concentration

• pH

• density

Which of these are most likely to be involved when preparing a soluble salt?

• mix

• warm

• filter

• evaporate

• distil

Tags

NGSS.MS-PS3-4

What do we call the very accurate piece of apparatus shown in this picture?

• burette

• pipette

• measuring cylinder

• conical flask

How many times more acidic is a solution with a pH of 2 compared to one with a pH of 4?

• 2 times

• 10 times

• 0.5 times

• 100 times

In the above picture, a powder is about to be poured into the liquid. Which of the following should be done to make this powder dissolve faster?

• stir the powder in the liquid

• freeze the mixture

• add more powder to the liquid

• store the mixture in a dark place

Tags

NGSS.MS-PS1-2

Which solute is the most soluble at 10 ⁰C?

• KI

• KClO₃

• NH₄Cl

• NH₃