Question:
Identify the oxidation state of chromium in \( \text{K}_3[\text{Cr}(\text{C}_2\text{O}_4)_3] \).
Identify the oxidation state of chromium in \( \text{K}_3[\text{Cr}(\text{C}_2\text{O}_4)_3] \).
Show Hint
Sum of oxidation states in a complex equals the charge on the complex ion.
Updated On: Jan 26, 2026
- \(+3\)
- \(+2\)
- \(+6\)
- \(+5\)
Show Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
Step 1: Determine the charge on the complex ion.
Since there are three \(\text{K}^+\) ions, the charge on the complex ion is \(-3\).
Step 2: Assign charges to ligands.
Each oxalate ion \((\text{C}_2\text{O}_4)^{2-}\) has a charge of \(-2\). Total charge from ligands \(= 3 \times (-2) = -6\).
Step 3: Calculate oxidation state of chromium.
Let oxidation state of Cr be \(x\): \[ x - 6 = -3 \Rightarrow x = +3 \] Step 4: Conclusion.
The oxidation state of chromium is \(+3\).
Since there are three \(\text{K}^+\) ions, the charge on the complex ion is \(-3\).
Step 2: Assign charges to ligands.
Each oxalate ion \((\text{C}_2\text{O}_4)^{2-}\) has a charge of \(-2\). Total charge from ligands \(= 3 \times (-2) = -6\).
Step 3: Calculate oxidation state of chromium.
Let oxidation state of Cr be \(x\): \[ x - 6 = -3 \Rightarrow x = +3 \] Step 4: Conclusion.
The oxidation state of chromium is \(+3\).
Was this answer helpful?
0
0
Top MHT CET Chemistry Questions
- The temperature of $32^{\circ}C$ is equivalent to
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
- If a metal crystallises in bcc structure with edge length of unit cell $4.29 \times 10^{-8}\, cm$ the radius of metal atom is
- Which of the following oxides can act both as an oxidising agent as well as reducing agent ?
- "The mass and energy both are conserved in an isolated system", is the statement of
View More Questions
Top MHT CET coordination compounds Questions
- Which of following coordinate complexes is an exception to $EAN$ rule ? (Given At. No. Pt = 78, Fe = 26, Zn = 30, Cu = 29)
- According to Werner?s theory the geometry of the complex is determined by
- What is the number of donar atoms in dimethylglyoximato ligand?
- Which among the following is a neutral complex?
- Taking chromium and arsenic, which are toxic, out of pressure-treated wood, and using new less toxic chemicals for bleaching paper, are examples of___________.
View More Questions
Top MHT CET Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- The temperature of $32^{\circ}C$ is equivalent to
- The line $5x + y - 1 = 0$ coincides with one of the lines given by $5x^2 + xy - kx - 2y + 2 = 0 $ then the value of k is
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
View More Questions