BMAT Chemistry Study Set with Questions and Answers

What is the formula of a buckminsterfullerene? C60 What is the ionic equation for acid + carbonate? 2H+ (aq) + CO3 2- (aq) - H2O (l) + CO2 (g) What is the ionic equation for acid + ammonia? H+ (aq) + NH3 (aq) - NH4 + (aq) Describe the ionic equation of a precipitation reaction. 1. Only ions used to form precipitate are included 2. The product will be (s) What is the value of Avogadro's constant? 6.022 x 10^23 What is a saturated solution? A solution in which no more solute can dissolve at that temperature What substances become less soluble as temperature increases? Gases (eg CO2) What substances become more soluble with temperature? Ionic compounds (eg NaCl) Describe the appearance of G1 compounds at RT. Shiny metallic solids Describe the trend in melting/boiling point down group 1. All quite low, decreases down group Which metals can be cut with a knife? Group 1 Which metals are often kept under oil? Group 1 What is the order of reactivity in the halogens? F Cl Br I What does a change of 1 on the pH scale represent? A change by factor of 10 in H+ concentration What state must an ionic compound be in for electrolysis to occur? Molten/dissolved in water