Solution concentrations and titration calculations Quiz
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5 questions, one answer each
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1. What is the concentration in mol dm⁻³ of a solution containing 0.0500 mol in 250 cm³?
- A. 0.0125 mol dm⁻³
- B. 12.5 mol dm⁻³
- C. 0.200 mol dm⁻³
- D. 0.500 mol dm⁻³
2. A solution of NaOH is 0.250 mol dm⁻³. What is its concentration in g dm⁻³ (M = 40.0)?
- A. 10.0 g dm⁻³
- B. 0.00625 g dm⁻³
- C. 160 g dm⁻³
- D. 0.250 g dm⁻³
3. Which is the colour change at the end-point when HCl is added to NaOH containing methyl orange?
- A. Red to yellow
- B. Colourless to pink
- C. Pink to colourless
- D. Yellow to orange
4. 25.0 cm³ of H₂SO₄ is neutralised by 20.00 cm³ of 0.100 mol dm⁻³ NaOH. What is the concentration of the acid?
- A. 0.0400 mol dm⁻³
- B. 0.0800 mol dm⁻³
- C. 0.0200 mol dm⁻³
- D. 0.160 mol dm⁻³
5. Why must the beaker and funnel be rinsed into the volumetric flask when making a standard solution?
- A. To make the solution more dilute
- B. To ensure all of the weighed solid is transferred
- C. To speed up dissolving
- D. To cool the solution