A student was measuring the rate of reaction using the apparatus in the diagram. What reaction is the student studying? A. CaO + H₂SO4 → CaSO4+H₂O B. Mg(OH)2 + 2HCI→ MgCl₂ + 2H₂O C. Fe + H₂SO4 → FeSO4+H₂ D. KCI + AgNO3 KNO3 + AgCl - Reaction mixture
