Balance the following reactions: Are the reactions oxidation-reduction reactions?   a)           Ag(s) + CN-(aq) + O2(g) + H2O(l) --> Ag(CN)2-(aq) + OH-(aq)   b)         TiO2(s) + C(s) + Cl2(g) --> TiCl4(g) + CO2(g) + CO(g)

You have a 1.153 g sample of an unknown solid acid, HA, dissolved in enough water to make 20.00 mL of solution. HA reacts with KOH(aq) according to the following balanced chemical equation:HA(aq)+KOH(aq) --------->KA(aq)+H2O(l)       If 14.90 mL of 0.585 M KOH is required to titrate the unknown acid to the equivalence point, what is the concentration of the unknown acid? ______ M      What is the molar mass of HA? _____  g/mol

In an analytical laboratory that analyzes BOD, the titrant solution of sodium thiosulphate must be standardized every 3 days. The standardized concentration can be determined with the help of a standard potassium dichromate solution. This is an oxidation and reduction reaction, as well as "lodometric reaction". The reactions of the process are: 6 KI + 14 HCI + K,Cr,0,- 2 CrCl, + 3 2 + 7 H,0 + 8 KCI 2 Na,s,0, +1,- Na,s,0, +2 Nal Given the standardization data in the table below, determine the missing values as indicated by the question mark. Number of Volume of 0.1065 Volume of Na,S,0, used Standardized concentration observation M K,Cr,0,, mL to titrate K,Cr,0, mL of Na,s,0,, M 01 10.0 6.65 ? 02 10.0 7.10 ? 03 10.0 6.80 ? 04 10.0 7.00 ? Mean: ? ? Standard deviation: ? Note: This question is one of the two questions that requires you to take a picture of your answer. That picture should be attached on the link provided. In cases when internet connectivity is bad, insert all pictures of…

50 mL of a 1.067 M solution of HCI was diluted to 250 mL. The diluted HCI solution was then titrated with an unknown concentration of KOH. It is found that an average volume of 24.20 mL of KOH is required to reach an endpoint in a titration with 25.00 mL of the dilute acid solution. The equation for the reaction is; H(aq) + OH(aq) →→> H₂O (1) The concentration of KOH is 0.2205 M Calculate the concentration of the KOH in g/L (you will need to find the formula weight of KOH to do this) 15| ΑΣΦ ? g/L

In one experiment, an 80.0-mL sample of hydrocyanic cid (HCN) was titrated with 20.0 mL of triiodide (I3-) in the reaction: HCN (aq) +  I3- (aq) --> ICN (aq) + 2 I- (aq) + H+ (aq)   40.0 mL of the same triiodide solution were required to titrate 0.200 mol of H3AsO3 (aq) in the reaction: H3AsO3 (aq) +  I3- (aq) + H2O (l) --> H3AsO4 (aq) + 3  I- (aq) + 2H+ (aq)   What is the molar concentration of HCN (aq)?  (Answer in sig figs)

Balance the following chemical equation (if necessary):

Ag(s)+Cu2+(aq)⟶Cu(s)+Ag+(aq)   Balance the reaction under acidic conditions using the lowest whole number coefficients. reactant- coefficients, formula, charge, phase products - coefficients, formula, charge, phase

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

A 3.00 mL bleach (NaOCI is the active ingredient) sample is mixed with potassium iodide and acid to completely form triiodide ions which titrated with 0.40 M thiosulfate solution. The endpoint is reached when 30.0 mL of the thiosulfate solution is added. What is the molar concentration of the bleach solution? CIO + 2 S2O32- + 2H+ → CI + S4062 + H20 а. 2.5 М O b. 0.5 M О с. 1.0 М O d. 2.0 M О е. 3.0 М

Determine the net ionic equation for the following reaction (if any) that occurs when the aqueous solution of K2S and Fe(NO3)2 are mixed. (A) K+ (ac) + NO3- (ac) → KNO3 (s) (B) Fe2+ (ac) + S2- (ac) + 2K+ (ac) + 2NO3- (ac) → FeS (s) + 2K+ (ac) + 2NO3- (ac) (C) Fe2+ (ac) + S2- (ac) + 2K+ (ac) + 2NO3- (ac) → Fe2+ + S2- (ac) + 2KNO3 (ac) (D) Fe2+ (ac) + S2- (ac) → FeS (s) (E) No ocurre reacción.