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What is the pH of a 0.031 M solution of aqueous Sr(OH)2?

The figures represent the change in concentration of A over time for the reaction aA  Products. Based on the half-life represented here, what is the order of the reaction?    

What is the conjugate acid for the base in the reaction below as written?                H2PO4–(aq) + H2SO4(aq) H3PO4(aq) + HSO4–(aq)  

AgBr has very low solubility in water. Silver ions form a complex ion with thiosulfate. Ag+(aq) + 2S2O32–(aq) ⇌ [Ag(S2O3)2]3–(aq) If sodium thiosulfate is added to a saturated solution of AgBr in equilibrium with solid AgBr, how will the concentrations of free Ag+(aq) and Br–(aq) change?

Which particle, if lost from the nucleus, will not change the element (no change to atomic number)?  

Consider the reaction at 298 K.                                            Sn2+(aq) + 2Fe3+(aq) → Sn4+(aq) + 2Fe2+(aq)            E° = 0.617 V What is the value of E when [Sn2+] and [Fe3+] are equal to 0.50 M and [Sn4+] and [Fe2+] are equal to 0.10 M?

Which salt produces a basic solution when dissolved in water?

How many electrons are transferred in the process below when balanced in basic solution?                                            ClO4–(aq) + Fe(s) → ClO3–(aq) + Fe3+(aq)              unbalanced

What is the standard electrode potential for a galvanic cell constructed in the appropriate way from these two half-cells?                                              Standard Reduction Potentials   Cr3+(aq) + 3e– → Cr(s)              E°red = –0.74 V                                   Co2+(aq) + 2e– → Co(s)              E°red = –0.28 V  

Three compounds with the generic formulas MX; MX2; and M2X all have the same value of Ksp = 2.5×10–8. What describes the relative molar solubilities of these compounds?