SATHEE: Some Basic Concepts Of Chemistry Question 17

Some Basic Concepts Of Chemistry Question 17

Question: $B r O_{3}^{⊙} + 5 B r^{⊙} \to B r_{2} + 3 H_{2} O$ If 50 mL 0.1 M $B r O_{3}^{⊙}$ is mixed with 30 mL of 0.5 M $B r^{Θ}$ solution that contains excess of $H^{\oplus}$ ions, the moles of $B r_{2}$ formed are

Options:

A) $6.0 \times 10^{- 4}$

B) $1.2 \times 10^{- 4}$

C) $9.0 \times 10^{- 3}$

D) $1.8 \times 10^{- 3}$

Show Answer

Answer:

Correct Answer: C

Solution:

Balance the equation: $\underset{1 m m o l}{B r O_{3}^{⊙}}, + \underset{5 m m o l}{5 B r^{⊙}}, \to \underset{1 m m o l}{3 B r_{2}}, + 3 H_{2} O$ Given: $50 \times 0.1$ $30 \times 0.5$ =5 mmol =15 mmol $B r^{⊙}$ is the limiting reagent. 5 mmol of $B r^{⊙}$ gives
$\Rightarrow$ 3 mmol of $B r_{2}$ 15 mmol of $B r^{⊙}$ gives $\Rightarrow$ $\frac{3 \times 15}{5}$ =9 mmol = $9 \times 10^{- 3} m o l$

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Some Basic Concepts Of Chemistry Question 17

Question: BrO3⊙+5Br⊙→Br2+3H2O If 50 mL 0.1 M BrO3⊙ is mixed with 30 mL of 0.5 M BrΘ solution that contains excess of H⊕ ions, the moles of Br2 formed are

Options:

Answer:

Solution:

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Question: $B r O_{3}^{⊙} + 5 B r^{⊙} \to B r_{2} + 3 H_{2} O$ If 50 mL 0.1 M $B r O_{3}^{⊙}$ is mixed with 30 mL of 0.5 M $B r^{Θ}$ solution that contains excess of $H^{\oplus}$ ions, the moles of $B r_{2}$ formed are