Write the balanced NET ionic equation for the reaction when ZnCl₂ and KOH are mixed in aqueous solution. If no reaction occurs, simply write only NR

Write the balanced NET ionic equation for the reaction when Al(NO3)3 and NaOH are mixed in an aqueous solution. If no reaction occurs write NR.

Write the balanced NET ionic equation for the reaction when NaOH and FeCl₂ are mixed in an aqueous solution. If no reaction occurs, simply write only NR.

A 25.00 mL aliquot is withdrawn from the liquid portion of saturated Manganese (II) hydroxide and transferred to an Erlenmeyer flask.  After the addition of methyl orange, a titration with 0.0045 M HCl was performed.  The endpoint was reached after 8.72 mL of the acid was added.   What is the balanced chemical equation? How many moles of hydroxide ions were neutralized in the reaction?  What is the molar concentration of hydroxide in the saturated solution?  What is the molar concentration of Magnesium ion in solution?

A 185 mL sample of 1.20 M Pb(NO₃)₂ is mixed with 99.5 mL of 1.50 M NaCl, and the PbCl₂ precipitate is filtered from the solution. Then 200 mL of 3.00 M NaBr is added to the remaining solution, and the PbBr₂ precipitate is also collected and dried. What is the mass of the PbBr₂ precipitate, assuming the yield in each precipitation step is 100%?