Created by StemPy LabConsider these statements about group 1 and group 2 compounds. S1: Solubility in water follows . S2: Solubility in water follows . S3: The decomposition temperature of the carbonate follows . S4: Both and lose on strong heating in a laboratory burner flame. S5: Sulfate solubility falls down group 2 because lattice enthalpy falls faster than hydration enthalpy. Which statements are correct?
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← Consider the period 3 oxides SiO₂, Cl₂O₇, Na₂O, P₄O₁₀ and Al₂O₃. Each oxide is treated separately with excess hot, concentrated aqueous NaOH. Which option gives both the correct order of increasing acidic character of the five oxides and the correct number of these oxides that consume NaOH to form a sodium salt?At 298 K, Δ_hydH is -520 kJ mol⁻¹ for Li⁺ and -322 kJ mol⁻¹ for K⁺. Their limiting molar conductivities are 38.7 and 73.5 S cm² mol⁻¹. S1: Li⁺ holds the most water, so its hydrated radius is largest and its mobility lowest. S2: Stokes' law makes hydrated K⁺ about 1.9 times larger than hydrated Li⁺. S3: Lithium metal melts highest in the group because Li⁺ is most strongly hydrated. S4: LiCl still colours a flame crimson, because the flame removes the water and gaseous atoms emit. Which statements are correct? →
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