Part A What minimum mass of HCI in grams would you need to dissolve a 2.7 g iron bar on a padlock? Express your answer using two significant figures. m = Submit Request Answer Part B How much H, would be produced by the complete reaction of the iron har?

The following chemical reaction takes place in aqueous solution: FeSO4(aq) + (NH4) S(aq) → FeS(s)+(NH4)₂SO4(aq) 2 Write the net ionic equation for this reaction.

Balance the following reactions that take place in basic solution.a) N2 H4 (aq) + CO32- (aq) "N2 (g) + CO (g)b) OCl - (aq) + I - (aq) " IO3- (aq) Cl - (aq)

Give the concentrations of all ions in each of the following solutions. 50 M Co(NO3)2     0 M FeCl3     25M Ba(OH)2 (aq)

CuO(s) + HCl(aq) → CuCl2 (aq) + H20(1) The mass of CuO was measured to be 2.500 g. The volume of HCl was measured to be 13.3 mL. The concentration of HCl was measured to be 1.50 M. b. Calculate the theoretical number of moles of CuCl2(ag) produced from HCI.

The following chemical reaction takes place in aqueous solution: ZnBr₂(aq)+Na₂S(aq) → ZnS(s)+2 NaBr(aq) Write the net ionic equation for this reaction. 0 k

A 1.4350-gram of KHP (actual formula = KHC8H4O4; molar mass = 204.22 g/mol) was dissolved in 50.00 mL of deionized water. The resulting solution was titrated with NaOH solution of unknown concentration. If 32.85 mL of the NaOH solution was required to reach the equivalent point, what was the molar concentration of the NaOH solution? The acid-base reaction is as follows:                 KHC8H4O4(aq)  +  NaOH(aq)  -->   NaKC8H4O4(aq)  +  H2O(l)          (A) 0.1405 M           (B) 0.2139 M           (C) 0.08481 M           (D) 7.0267 x 10–3 M

true or false?  The following reaction equation is a redox reaction: 2H2O (l) + 2Cl- (aq) ⟶ H2 (g) + Cl2 (g) + 2OH- (aq)

The following chemical reaction takes place in aqueous solution: AgF(aq)+KCl(aq) →AgCl(s)+KF(aq) Write the net ionic equation for this reaction. ☐

You are preparing standard acid and base solutions for the laboratory, using potassium hydrogen phthalate (KHC₈H₄O₄, abbreviated KHP) as the primary standard. KHP (molar mass = 204.22 g/mol) has one acidic hydrogen. You prepared solutions of both NaOH and HCl. It took 22.65 mL of the NaOH solution to titrate (react exactly with) 1.55 g KHP. It then took 32.35 mL of HCl solution to titrate 25.00 mL of the NaOH solution. What is the molarity of the HCl solution?