concentrated and dilute acid

The amount of material dissolved in a measure of liquid is______

• dilute

• concentration

• volume

An acid reacts with metal to produce 

• Carbon dioxide 
• Hydrogen gas
• Hydrogen gas and water 
• Salt and hydrogen gas 

Which one of the following best describes the reaction between a metal and an acid?

• metal + acid ➞ metal oxide + hydrogen

• metal + acid ➞ salt + carbon dioxide

• metal + acid ➞ salt + water

• metal + acid ➞ salt + hydrogen

Metals that react quickly/strongly with water and acids are called?

• Reactive
• Unreactive
• Dangerous
• Corrosive

Which one of the following metals will NOT react with a dilute acid?

• iron (Fe)

• tin (Sn)

• magnesium (Mg)

• zinc (Zn)

salt produced when calcium reacts with sulfuric acid is ....

• calcium carbonate

• calcium sulfate

• calcium chloride

• calcium nitrate

How do we know that the reaction of metal and acid stops?

• When we see color change

• When we see bubbles

• When the temperature stops rising

• When the temperature stops falling

Which of the following is NOT the safety precaution of doing an experiment of the reaction of metal with acid?

• use safety goggles

• use gloves

• put the acid bottle lid upside down on the table

• sit while working

You add solid sugar to a beaker of water and stir. Some settles to the bottom. You add more and all of it went to the bottom. Which describes it?

• dilute

• concentrated

• saturated

• unsaturated

What is the difference between a solution that is dilute and one that is concentrated?

• dilute has more solute

• dilute has less solute

• They have the same amount of solute

• dilute solutions are at a higher temperature