From the jewelry descriptions given, select the homogeneous mixture or solution.
Answer??
10 carat (K) electroplated gold jewelry
24 carat (K) gold jewelry (i know this is pure gold)
18 carat (K) gold jewelry
Are these right?
CaCl2>>calcium chloride
NaF>>>sodium fluoride
I answered both questions earlier.
thanks so, would 18 carat gold jewelry be the right answer?
To determine if the given jewelry descriptions represent homogeneous mixtures or solutions, we need to understand the composition of each jewelry piece.
1. 10 carat (K) electroplated gold jewelry: This description suggests that the jewelry is made of gold that has been electroplated. Electroplating involves depositing a layer of gold onto a different metal using an electrical current. In this case, the jewelry consists of a base metal, such as silver or copper, with a layer of gold on the surface. Since the gold is only on the surface and not mixed throughout the jewelry, it is not a homogeneous mixture or solution.
2. 24 carat (K) gold jewelry: This description indicates that the jewelry is made of 24 carat gold. In jewelry, the term "carat" refers to the purity of the gold. 24 carat gold is considered pure gold, meaning it contains 99.9% gold and no other metals. Since it consists of only one component (gold) and does not contain any other substances, it can be considered a homogeneous substance or pure gold.
3. 18 carat (K) gold jewelry: This description suggests that the jewelry is made of 18 carat gold. 18 carat gold is an alloy composed of 75% gold and 25% other metals (such as copper, silver, or zinc) to increase its durability and alter its color. Since it is a mixture of gold and other metals, it can be classified as a homogeneous mixture.
Regarding the additional chemical formulas you mentioned:
- CaCl2 (calcium chloride) is a compound composed of calcium and chloride ions. It is not directly related to the jewelry descriptions provided.
- NaF (sodium fluoride) is also a compound, consisting of sodium and fluoride ions. It is not relevant to the jewelry descriptions provided.
Therefore, based on the given jewelry descriptions, the 24 carat gold jewelry would be considered a homogeneous substance, while the 18 carat gold jewelry would be considered a homogeneous mixture.