The common name, "cream of tartar" refers to

Options

A. `KHC_(4)H_(4)O_(6)`
B. `KC_(4) H_(5)O_(6)`
C. `KNaC_(4)H_(4)O_(6)`
D. `Mg_(2) (OH)_(2) (C_(4) H_(4) O_(6)) H_(2)O`

Answer

To solve the question regarding the common name "cream of tartar," we will follow these steps:

### Step 1: Understand the Common Name
The common name "cream of tartar" refers to a specific chemical compound. It is important to identify what this compound is commonly known as in chemistry.

**Hint:** Look for the chemical properties and uses of cream of tartar to identify its chemical formula.

### Step 2: Identify the Chemical Composition
Cream of tartar is known chemically as potassium hydrogen tartrate. This compound is derived from tartaric acid and is a potassium salt.

**Hint:** Consider the components of tartaric acid and how they relate to potassium to find the correct formula.

### Step 3: Write the Chemical Formula
The chemical formula for cream of tartar is KHC4H4O6. However, it is often represented as KC4H5O6, which indicates that it is a potassium salt of tartaric acid.

**Hint:** Pay attention to the presence of potassium (K) and hydrogen (H) in the formula, as well as the carbon (C) and oxygen (O) atoms.

### Step 4: Confirm the Uses and Origin
Cream of tartar is widely used in baking as a stabilizing agent for egg whites and in the production of certain cleaning solutions. It is also a byproduct of the wine industry, where it forms during the fermentation process.

**Hint:** Think about the applications of cream of tartar in cooking and industry to reinforce your understanding of its importance.

### Step 5: Conclusion
Based on the above steps, we conclude that the common name "cream of tartar" refers to the chemical compound with the formula KC4H5O6.

**Final Answer:** The common name "cream of tartar" refers to KC4H5O6.