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- 8. A 2.856-g sample of limestone was analyzed for Fe, Ca, and Mg. The iron was determined as Fe;Os, yielding 0.04561 g. Calcium was isolated as CaSO4, yielding a precipitate of 1.487 g, and Mg was isolated as 0.1599 g of Mg;P2O7. Report the amount of Fe, Ca, and Mg in the limestone sample as %w/w FeO, %w/w CaO, and %w/w MgO.What is the oxidation number of H in each of the following: H2(g); H2SO4; NaH For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BI US Paragraph Arial 10pt II I!!8. Write the net ionic equation for cach reaction. a. K;CO;(aq) + CaCl:(aq) → CaCO;(s) + 2KCI(aq) b. Pb(NO3):(aq) + (NH,);S(aq) → 2NH,NO;(aq) + PbS(s) 2LİCI(aq) + 2Hg.(NO,)(aq) → Hg,Cl;(s) + 2LİNO;(aq) d. 2NAOH(aq) + MgCl;(aq) -AMg(OH):(s) + 2NaCl(aq) 2011 Cengage Leaning All Rights Reserves May tiet beseanned.copied.or duplicated, or posted to a publicly accessible websi Chapter 7: Reactions in A 33,765)
- A 0.879 g sample of a CaCl2·2H2O/K2C2O4·H2O solid salt mixture is dissolved in ~100mL of deionized water. The precipitate, after having been filtered and air-dried, has a mass of 0.284 g. The limiting reactant in the salt mixture was later determined to beCaCl2 ·2H2O. a.Write the ionic equation for the reaction. b.Write the net ionic equation for the reaction. c.How many moles and grams of CaCl2 ·2H2O reacted in the reaction mixture? d.How many moles and grams of the excess reactant, K 2C2O 4H2O, reacted in the mixture? e.How many grams of the K2C2O4·H2O in the salt mixture remain unreacted (inexcess)? f.What is the percent by mass of each salt in the mixtureDetermine the oxidation state of all the elements in HPO42-.Balance the reaction between P and F to form PH3 and F₂ in basic solution. When you have balanced the equation using the smallest integers possible, enter the coefficients of the species shown. Enter "1" if the coefficient is "1." P + PH3 + F₂ Water appears in the balanced equation as a (reactant, product, neither) with a coefficient of (Enter 0 for neither.) How many electrons are transferred in this reaction?
- 1.750 g öf HBF ih 250.0 ML of 1410 aqueous solution der the following reacti.. 8. You are asked to make 250.0 mL of a 1.5 M solution of H2SO4 in lab. You have a stock solution of 10.0 M H2SO4 available to you. How do you make the solution? + 9. Consider the balanced reaction in 1b above. If you begin with a 150.0 mL of a 1.3 M solution of NH&OH and excess CuSO4, how much Cu(OH)2 will you produce? MacBook Pro DII F9 F10 F3 F4 F5 F6 F7 F8 @ 2# 2$ 2 3 4 5 8 W R Y この LLThe ascorbic acid, C,H;Os (176.124 g/mmol) content of a bottle of peach juice containing 2.50 L was determined by titration with a standard solution of potassium iodate, KIO3. The KIO; solution was prepared by dissolving 100.4 mg primary standard grade KIO; (214.001 mg/mmol) to a final volume of 250.0 mL. To a 200.00-mL aliquot of the sample, 10 mL of KI, 10 mL of HCl and 5 mL of starch solution were added and subsequently titrated, requiring 18.19 mL of the KIO; titrant. The relevant reactions are given below: KIO; + 5KI + 6H* → 3l2 + 6K* + 3H;0 CH;O, + l2→ CH,O, + 21- + 2H* a. How many millimoles of ascorbic acid is in the titrated sample? b. What is the mass of ascorbic acid per bottle of the peach juice?73 Al ihe school ey decided to adt sodum carbonae (NaCOJ tohe sampled wster in the school tankin order to restore he sttavalue close to The balanced equartion for the reaction is Na,Co.e) + 2HC (ag - 2Nac (ag • H0()• co; (al 731 Calcuate the mass of sodum cartonate (Na,CO.) required to neutralize each 1 dm' of the sample water 732 Ater the neutralization. the water tasted saty. Give a reason for the saly taste of the water Refer to the equation above.
- Consider the reaction: H;C,O, + KMNO, + H,SO, CO, + MnSO, + K;SO, + H,O. What should be the coefficient of H;C,O, in order to balance the equation?(Last Day Promotio... Kronos Worktorce... Maame Acheampo... MIDTERM M [Review Topics] [References] Use the References to access important values if needed for this question. How many grams of Ag,CO3 will precipitate when excess Na,CO3 solution is added to 77.0 mL of 0.690 M AGNO, solution? 2AGNO3(aq) + Na,CO3(aq) Ag,CO3(s) + 2NAN03(aq) + 2NaNO3(aq) Submit Answer Retry Entire Group 9 more group attempts remainingGravimetric 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