how do i write the formula for this? cesium diamminetetracyanochromate(III)
Cs[Cr(NH3)2(CN)4]
Ah, writing chemical formulas can be quite a tongue-twister! Don't worry, I'll give it my best shot. So, for the compound you mentioned, cesium diamminetetracyanochromate(III), we can break it down step by step:
- Start with the symbol for cesium, which is Cs.
- Next, add "diammine" in brackets, indicating that there are two ammonia molecules (NH3) attached to the central metal ion, which is cesium. So, we have (NH3)2.
- Following that, we add "tetracyano" in brackets, indicating that there are four cyanide ions (CN-) surrounding the central metal ion. Therefore, we have (CN)4.
- Finally, we put "chromate(III)" outside the brackets to show the oxidation state of the central metal ion. Chromate usually has a charge of 2-, so when it's chromate(III), it means the metal ion (cesium) has a charge of +3, which is Cs(III).
Combining all these parts together, we get the chemical formula for cesium diamminetetracyanochromate(III) as Cs(NH3)2(CN)4(Cr)3. Phew! Hope that brought a smile to your face!
To write the formula for cesium diamminetetracyanochromate(III), follow these steps:
Step 1: Identify the ions present in the compound:
- "Cesium" refers to the Cs+ ion.
- "Diammine" refers to a complex ion containing two NH3 (ammonia) ligands, written as [NH3]2+.
- "Tetracyanochromate(III)" refers to a complex ion containing one Cr(CN)4 ligand, written as [Cr(CN)4]3-.
Step 2: Determine the charges of the ions involved:
- Cesium (Cs) is an alkali metal and has a charge of +1.
- Ammonia (NH3) has no charge, so the diammine ion ([NH3]2+) has a charge of +2.
- Cyanide (CN-) has a charge of -1. Since there are four cyanide ligands, the tetracyanochromate(III) ion ([Cr(CN)4]3-) has a charge of -3.
Step 3: Balance the charges:
Since the cesium (Cs+) ion has a charge of +1 and the tetracyanochromate(III) ion has a charge of -3, you will need three Cs+ ions to balance the charge. To balance the charge of the diammine ion, it already has a charge of +2, so no further adjustment is necessary.
Step 4: Write the final formula:
The final formula for cesium diamminetetracyanochromate(III) is Cs3[Cr(CN)4]2.
To write the formula for cesium diamminetetracyanochromate(III), you will need to determine the correct symbols and subscripts based on the compound's name.
Here's an explanation of the naming conventions for this compound:
1. "Cesium" refers to the metal cation, which is Cs⁺.
2. "Diammine" indicates the presence of two ammonia (NH₃) ligands. Each NH₃ ligand contributes one nitrogen (N) atom and three hydrogen (H) atoms.
3. "Tetracyanochromate" signifies the presence of a tetracyanochromate(III) anion. The "chromate" part implies the presence of a chromate ion (CrO₄²⁻), and "tetracyano" indicates four cyano (CN⁻) ligands.
Based on this information, we can break down the formula as follows:
The cesium cation is Cs⁺.
The diammine ligands are (NH₃)₂.
The tetracyanochromate(III) anion is [Cr(CN)₄]³⁻.
To write the formula, we combine these components while ensuring the charges balance:
Cs⁺ [Cr(CN)₄]³⁻ (NH₃)₂
Thus, the formula for cesium diamminetetracyanochromate(III) is Cs[Cr(CN)₄](NH₃)₂.