Multiple choice question about the effects on pH when a buffer is diluted.
What is the effect on pH when a buffer is diluted by a factor of 10? a. The buffer pH does not change appreciably b. The buffer pH increases by 1 c. The buffer pH decreases by 1 d. The buffer pH increases by 10 e. The change is dependent on Ka of the acid
The value of the equilibrium constant for the following reaction is 345. A+2B(equilibrium sign)3C+D What is the value of the equilibrium constant for the following reaction? 2A+4B(equilibrium sign)6C+2D K=?
what are the units of the rate constant for the following expression: rate=k[A](exponent 2)[B]
The following system is at equilibrium: NH4Cl(s)(equlibrium sign)NH3(g)+HCl(g) Which of the following will cause the reaction to move to the left? a. addition of NH4Cl(s) b. removal of NH4Cl(s) c. removal of NH3(g) d. addition of HCl(g) e. both answers b and d are correct
A multiple choice question about homogenous equilibria.
Which of the following is a homogenous equilibria expression? a. CaCO3(s) <=> CaO(s)+CO2(g) b. NH3(g)+HCl(g) <=> NH4Cl(s) c. Mg(s)+Cl2(g) <=> MgCl2(s) d. FeO(s)+CO(g) <=> Fe(s)+CO2(g) e. 2NO(g)+O2(g) <=> 2NO2(g)
What is the relationship between the pKa for an acid-base indicator and the pH at which the indicator changes colour? pH=?
1.) A saturated solution of calcium sulfate can be prepared by diluting 0.29g of CaSC4 to 250mL. what is the Ksp of calcium sulfate? 2.) At pH 10.0, only 0.019g of MgCl2 will dissolve per 1L of solution. What is the Ksp of magnesium hydroxide, Mg(OH)2?
What is the equilibrium constant expression for dissolving lead oxalate, PbC2O4, in water? Ksp=?
1.) What is the net ionic equation for the reaction of AgBr with a strong acid? 2.) What is the net ionic equation for the reaction of NaCl with a strong base?
1.) What is the water solubility of AgCl in moles per liter? 2.) What is the water solubility of PbBr2 in moles per liter?
