Question

Classify each substance as an element, a compound, a homogeneous mixture, or a heterogeneous mixture.

 Element Compound Homogeneous mixture Heterogeneous mixture Answer Bank

Answer Bank

Classify the phrases pertaining to pure substances and mixtures as either true or false. True False 

Components of a homogeneous mixture are visibly distinct. 

The components of homogeneous and heterogeneous mixtures cannot be separated, 

Heterogeneous mixtures contain more than one part, and each part has its own properties. 

Homogeneous mixtures have uniform properties throughout 

Pure substances only contain one type of substance and nothing else.

Classify each example as an element, a compound, a heterogeneous mixture, or a homogeneous mixture. 

Element Compound Heterogeneous mixture Homogeneous mixture

a uniform shiny yellow-orange solid that when melted produces two distinct liquids 

sodium hydroxide

a red-orange solid with a melting point of 1085 "C that cannot be broken down into simpler substances by chemical processes 

a liquid that separates into three distinct layers 

a liquid composed of a single substance that when an electric current passes through it produces two ases that cannot be broken down into simpler substances

Calculate the molarity of the two solutions. 

The first solution contains 0.200 mol of NaOH in 1.85 L of solution. 

The second solution contains 23.5 g of NaCl in 631 mL of solution. 

Answer 1

Molarity = 0.108 M