Activity From the given equation and give the type of chemical reaction and balance. 6) NH,OH + HBr H,0 + NH „Br 7) Pb O 2 PbO, + 8) Na „CO, + heat Na „0 + CO 2 9) KI C 2 KCI + 12 + 10) C3H3 + O 2 CO 2 + H20 105 of 116
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- Potassium dichromate has several industrial applications. To determine the purity of the salt that will be used in different industrial processes, a sample mass equal to 2.660 g was dissolved and quantitatively transferred to a 500.00 mL flask. An aliquot of 25.00 mL of this solution was treated with excess KI and the released iodine was titrated with 0.1000 mol L-1 sodium thiosulfate, spending 27.00 mL. Calculate the purity of the analyzed salt. Data:K = 39.10 O = 16.00 Cr = 52.00 I = 126.9 S = 32.07Airbag experiment The simulation link is provided below if needed. It's probably best to use the simulation because the pictures attached won't show everything in full. Simulation link: https://interactives.ck12.org/simulations/chemistry/decomposition-reaction/app/index.html?screen=sandbox&lang=en&referrer=ck12Launcher&backUrl=https://interactives.ck12.org/simulations/chemistry.html Just select ammonium nitrate and then select 1 mole and press play. Record macroscopic observations of the bag and the crash test dummy as well as microscopic observations of the particles within the steering mechanism and the inflated/inflating airbag.If all other variables were kept constant, determine theeffect that the following errors would have on the calculatedpercent yield of the product. Would the yield be expected toincrease, decrease, or would there be no effect? Explainyour reasoning.– The product was insufficiently dried before weighing.– Some of the product was lost during the transfer fromthe Buchner funnel to the evaporating dish.– 7.5 mL of FeCl3 was added instead of 3.0 mL asoutlined in the procedure.– 4.587g of K2C2O4H2O was used instead of exactly4.000g .– The recrystallization step was skipped and theexperiment went straight to vacuum filtration.
- A first-stage recovery of magnesium from seawater is precipitationof Mg1OH22 with CaO:Mg2+(aq) + CaO(s) + H2O(l)---->Mg(OH)2(s) + Ca2+(aq) What mass of CaO, in grams, is needed to precipitate 1000lb of Mg(OH)2?Airbag experiment The simulation link is provided below if needed. It's probably best to use the simulation because the pictures attached won't show everything in full. Simulation link: https://interactives.ck12.org/simulations/chemistry/decomposition-reaction/app/index.html?screen=sandbox&lang=en&referrer=ck12Launcher&backUrl=https://interactives.ck12.org/simulations/chemistry.html Just select ammonium nitrate and then select 2 moles and press play. Record macroscopic observations of the bag and the crash test dummy as well as microscopic observations of the particles within the steering mechanism and the inflated/inflating airbag.Gravimetric analysis of Fe3O4 (MW = 232 g/mole) may be undertaken with the following reactions: Fe3O4 → Fe2O3 → Fe (OH)3. Weight of sample containing 8.00% Fe3O4 that must be taken to obtain a precipitate of Fe(OH)3 (MW = 107 g/mole) that weighs 150 mg is . a. 0.108 g b. 0.325 g c. 1.355 g d. 4.065 g Amount of Fe2O3 (MW = 160 g/mole) from which 150 mg of Fe(OH)3 (MW = 107 g/mole) may be obtained is . a. 0.112 g b. 0.224 g c. 0.448 g d. none of the other choices
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- Which of the following are equivalent to 2,500 ppm Cu2+? (There may be more than one answer) MW: Cu (63.55) a) 2.5 ppb Cu2+ b) 2,500,000 ppb Cu c) 2.5 ppt Cu2+ d) 39.34 mM e) 0.03934 M f) 0.07868 N (in precipitation reaction) g) 0.07868 N (in redox into Cu+)The percentage protein content of chicken breasts are determined 5 times and the following results obtained: 28.5, 30.1, 30.2, 30.0 en 30.2%. The first value (28.5%) appears anomalous. Should it be retained or rejected at a 90% confidence level? Show all equations.1) Commercial fuming Sulphuric acid (Oleum-H2S2O6) is 99.9% solution. Please convert it into molarity.2) Find out the Volume (dm3) of product (gas) at RTP when 0.58 M, 150 mL NaOH (aq.) reacts with 350 mL, 0.25 NH4Cl.