please explain clearly the steps to solve number 11. Solid calcium reacts with w

Question

please explain clearly the steps to solve number 11.

Solid calcium reacts with water to form Ca(OH)2 and H2(g)- 2.58g Ca is dissolved in enough water so that the final volume Is 100.0 ml. The solution weighs 110.0g (write out a balanced eqn. 1st) Ca(s) + H2Om rightarrow Ca (OH)2(aq) What is the molarity of the Ca(OH)2 solution? What is the concentration of the Ca(0H)z in %(m/v)? What is the concentration of the Ca(OH)2 in %(w/w)? In lab. you plan on using an aqueous solution of sulfuric acid (H2SO4) as part of an experiment

Explanation / Answer

Ca + 2 H2O ----> Ca(OH)2 + H2 a) Vol = 100 ml moles of calcium = 2.58/40 = 0.0645 Molarity = moles / volume = 0.0645/0.1 = 0.645 M b) %(m/v) = 2.58/100 = 0.0258 g/ml or 0.0258 kg/L c) %(w/w) = 2.58 / 110 = 0.02345

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.