Question

e) benedict’s reagent is blue in color ______

1. classify each of the following samples of matter as an element, compound, solution or mixture

a) sugar and water ______
b) iron fillings ______
c) air ______
d) aluminum ______
e) baking soda ______
f) brass ______

Explanation:

To solve this, we analyze each sample based on the definitions of element, compound, solution (a type of mixture), and mixture:

a) Sugar and water

• A solution is a homogeneous mixture where a solute (sugar) dissolves in a solvent (water).
• Classification: Solution (or Mixture)

b) Iron fillings

• Iron is a pure substance made of only iron atoms (Fe), so it is an element.
• Classification: Element

c) Air

• Air is a mixture of gases (e.g., N₂, O₂, CO₂, etc.) with uniform composition (homogeneous), so it is a solution (a type of mixture).
• Classification: Solution (or Mixture)

d) Aluminum

• Aluminum is a pure substance made of only aluminum atoms (Al), so it is an element.
• Classification: Element

e) Baking soda (sodium bicarbonate, \( \text{NaHCO}_3 \))

• Baking soda is a pure substance made of multiple elements (Na, H, C, O) chemically bonded, so it is a compound.
• Classification: Compound

f) Brass

• Brass is an alloy (mixture) of copper and zinc with uniform composition (homogeneous), so it is a solution (a type of mixture).
• Classification: Solution (or Mixture)

Final Answers:

a) Solution (Mixture)
b) Element
c) Solution (Mixture)
d) Element
e) Compound
f) Solution (Mixture)

Answer:

To solve this, we analyze each sample based on the definitions of element, compound, solution (a type of mixture), and mixture:

a) Sugar and water

• A solution is a homogeneous mixture where a solute (sugar) dissolves in a solvent (water).
• Classification: Solution (or Mixture)

b) Iron fillings

• Iron is a pure substance made of only iron atoms (Fe), so it is an element.
• Classification: Element

c) Air

• Air is a mixture of gases (e.g., N₂, O₂, CO₂, etc.) with uniform composition (homogeneous), so it is a solution (a type of mixture).
• Classification: Solution (or Mixture)

d) Aluminum

• Aluminum is a pure substance made of only aluminum atoms (Al), so it is an element.
• Classification: Element

e) Baking soda (sodium bicarbonate, \( \text{NaHCO}_3 \))

• Baking soda is a pure substance made of multiple elements (Na, H, C, O) chemically bonded, so it is a compound.
• Classification: Compound

f) Brass

• Brass is an alloy (mixture) of copper and zinc with uniform composition (homogeneous), so it is a solution (a type of mixture).
• Classification: Solution (or Mixture)

Final Answers:

a) Solution (Mixture)
b) Element
c) Solution (Mixture)
d) Element
e) Compound
f) Solution (Mixture)