What is the concentration of Ca2+ that can be found in a saturated solution of CaF2 (s) at 25 °C ? Note: At 25 °C, Ksp of CaF2 (s) = 6.5 x 10-6 O 9.8 x 10-2 M 1.8 x 10-3 M 1.2 x 10-2 M 2.6 x 10-3 M

1. What is the equilibrium constant expression for the following reaction? (Pay careful attention to the phase indicators!) 2 HCl (g) + Mg(OH)2 (s) ? MgCl2 (aq) + 2 H2O (l)

thanks for the help for review

The solubility product for silver chloride is 1.6 x 10−10. What is the molar solubility of silver chloride in a 6.5 x 10−3 M AgNO3 aqueous solution at 298 K? Group of answer choices 6.5 x 10−3 M 2.5 x 10−8 M 1.3 x 10−5 M 4.8 x 10−4 M 2.8 x 10−20 M

The equilibrium constant, Keq, for the reaction: 2 NOCl(g) -> 2NO(g) + Cl2(g) is 2.4 x 10-7 (no units). What is the Keq for the reaction 1/3 Cl2(g) + 2/3 NO (g) -> 2/3 NOCl(g)

5. Calculate the solubility (g/L) for silver sulfate, Ag2SO4 in 0.250 M AgBr. Ksp = 1.5 x 10s %3D

At a certain temperature the value of the equilibrium constant, Kc, is 0.8375 for the reaction. SiO2 (g) + 4HCI (g) = SiCl4 (g) + 2H2O (g) What is the value of Kc for the following reaction? 2SiCl4 (g) + 4H20 (g) 2SiO2 (g) + 8HCI (g) B 1.426 -0.8375 -1.6750 Show work..don't give Handwritten answer. D 0.8375 £0.7014 F-0.7014 G-1.426 0.9152

Mass, Volume and Keq An equilibrium mixture, at 712°C in a 1972-mL container, involving the chemical system N2(g) + 3H2(g) — 2NH3(g) is found to contain 1.26 g of №₂, 0.227 g of H₂, and 9.76×10-³ g of NH3. Calculate the equilibrium constant (Keq expressed in terms of the molar concentrations) at the given temperature. (No units required.) 0.0148

Consider the following equilibrium reaction: PBr5(g) + 1/2 O2(g) = POB13(g) + Br2(g) Kc = 5.6 x 102 at 512 K Calculate K. for the reaction 2 PBr5(g) + O2(g) = 2 POBR3(g) + 2 Br2(g) at the same temperature. 24 1.1 x 103 280 5.6 x 102 O None of these 3.2 x 105

Decide whether each of the following statements is true or false.  If false, change the wording of the statement to make it true.   a) Only the concentration of CO2 appears in the equilibrium expression for the reaction: CaCO3 (s) ↔ CaO (s) + CO2 (g). B) For the reaction CaCO3 (s) ↔ CaO (s) + CO2 (g), the value of K is numerically the same whether the amount of CO2 is expressed as molarity or as gas pressure.