paper-1a – Page 11 – Vertex Learnbox

M25-CHEM-HL-TZ1-P1A-Q32

Which two species can be both Br\o nsted-Lowry acids and Br\o nsted-Lowry bases?

A solution has a pH of 3.0. What is the hydroxide ion concentration, \( [OH^{-}] \), in the solution?

Which elements would react with each other most vigorously?

Which statement explains why transition elements have variable oxidation states?

Consider this molecule, deca-3,5,7-triene-2,9-dione. How many stereoisomers are possible for deca-3,5,7-triene-2,9-dione?

What is a disadvantage of using infrared (IR) spectroscopy as a technique?

Which equation correctly shows both enthalpy of formation, \( \Delta H_f^{\ominus} \), of a compound and enthalpy of combustion, \(

0.050 mol of sodium hydrogencarbonate was added to \( 50 \, cm^3 \) of \( 2.0 \, mol \, dm^{-3}

Chloroethane is produced by the reaction of ethane with chlorine: \( C_2H_6(g) + Cl_2(g) \rightarrow C_2H_5Cl(g) + HCl(g) \). The

Which of the following reactions will have the largest positive change in entropy?