For the reaction shown, compute the theoretical yield of the
product (in grams) for each of the following initial amounts of
reactants.
Ti(s)+2F2(g)→TiF4(s)
1)7.0 g Ti , 7.0 g F2
Express your answer using two significant figures.
m= ______ g
2) 2.3 g Ti , 1.5 g F2
Express your answer using two significant figures.
m=_______ g
3) 0.236 g Ti , 0.292 g F2
M =_____ g
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In: Chemistry
A 2.32 g sample of a substance suspected of being pure gold is warmed to 71.9 ∘C and submerged into 15.9 g of water initially at 24.9 ∘C. The final temperature of the mixture is 26.7 ∘C.
What is the heat capacity of the unknown substance?
In: Chemistry
Consider the following balanced equation Ca3(PO4)2 (s) + 3H2SO4 (aq) -------> 3CaSO4 (s) + 2H3PO4 (aq)
What masses of calcium sulfate and phosphoric acid can be
produced from the reaction of 1.0 kg calcium phosphate with 1.0 kg
concentrated sulfuric acid (98% H2SO4 by
mass)?
In: Chemistry
A 2.43 g lead weight, initially at 10.6 ∘C, is submerged in 7.78 g of water at 52.9 ∘C in an insulated container. What is the final temperature of both the weight and the water at thermal equilibrium?
In: Chemistry
1. Which of the following slightly soluble substances are more soluble in acidic solution: AgCl AgCN CaF2? Explain why.
2. 50.0 ml of a solution containing 0.010M Pb(NO3)2 is mixed with 50.0 ml of a solution containing 0.10 M NaCl. What will the concentrations of Pb++ and of Cl– be after the mixing? PbCl2 has a Ksp = 1.7 x 10-5 . What is the value of Q for the lead and chloride ions? Will a precipitate form in the mixture? Why or why not.
In: Chemistry
| Weak Acid | Ka | Weak Base | Kb |
| CH3COOH (Acetic Acid) | 1.8 X 10-5 | NH3 (Ammonia) | 1.76 X 10-5 |
| C6H5COOH (Benzoic Acid) | 6.5 X 10-5 | C6H5NH2 (Aniline) | 3.9 X 10-10 |
| CH3CH2CH2COOH (Butanoic Acid) | 1.5 X 10-5 | (CH3CH2)2NH (Diethyl amine) | 6.9 X 10-4 |
| HCOOH (Formic Acid) | 1.8 X 10-4 | C5H5N (Pyridine) | 1.7 X 10-9 |
| HBrO (Hypobromous Acid) | 2.8 X 10-9 | CH3CH2NH2 (Ethyl amine) | 5.6 X 10-4 |
| HNO2 (Nitrous Acid) | 4.6 X 10-4 | (CH3)3N (Trimethyl amine) | 6.4 X 10-5 |
| HClO (Hypochlorous Acid) | 2.9 X 10-8 | (CH3)2NH (Dimethyl amine) | 5.4 X 10-4 |
| CH3CH2COOH (Propanoic Acid) | 1.3 X 10-5 | CH3CH2CH2NH2 (Propyl amine | 3.5 X 10-4 |
| HCN (Hydrocyanic Acid) | 4.9 X 10-10 |
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When you titrate 17.2 mL of a 0.14 M solution of (CH3)3N (trimethylamine), it required 17.0 mL of hydrochloric acid solution. Assuming that you have reached the equivalence point, what is the pH of the resulting solution?
In: Chemistry
The titration of weak diprotic acid H2A with strong base is conducted. What is the pH of the solution at the following volumes, 0,10,25,50,60,75,100,125,and 150mL if Ka1=1.0x10^-4 and Ka2=3.5x10^-4 and the concentrations for both HA- and OH- are 0.1M?
In: Chemistry
A 62.0 mL sample of a 0.122 M potassium sulfate solution is mixed with 36.5 mL of a 0.108 M lead(II) acetate solution and the following precipitation reaction occurs: K2SO4(aq)+Pb(C2H3O2)2(aq)→2KC2H3O2(aq)+PbSO4(s) The solid PbSO4 is collected, dried, and found to have a mass of 0.992 g . Determine the limiting reactant, the theoretical yield, and the percent yield.
In: Chemistry
do the equilibruim concentration of the reactants and the products depend on their initial concentration?
In: Chemistry
Oxy-myoglobin was measured at wavelength of 417 nm with molar absorptivity of 12,800 M^-1cm^-1. Met-myoglobin was measured at wavelength of 409 nm with molar absorptivity of 17,900 M^-1cm^-1. In 10.0 g of meat (3.0 mL of total solution) the absorbance of oxy-myoglobin was 0.769 using a 1 cm cell and the met-myoglobin was 0.346. Find the moles of oxy-myoglobin and the met-myoglobin per gram of meat.
In: Chemistry
Determine the number of possible electron arrangements given the following term:
4D
please show how you determined the answer
In: Chemistry
Calculate the pH change that results when 11 mL of 5.8 M NaOH is added to 776 mL of each the following solutions. (See the appendix.)
pKa = 9.25
Ka = 5.6e-10
(c) 0.10 M NH3
In: Chemistry
Titanium (Ti) is a strong, lightweight metal that is used in the construction of rockets, jet engines, and bicycles. it can be prepard by reacting TiCl4 with Mg metal at very high temperatures. The products are Ti(s) and MgCl2.
a) provide a balanced chemical reaction for the reaction described above.
b) how many grams of Ti metal can be produced from a reaction involving 3.54 * 10^4 g of TiCl4 and 6.53*10^3 g of Mg?
In: Chemistry
Consider the reaction of iron (III) sulfate (aq) and sodium phosphate (aq) to form iron (III) phosphate (s) and sodium sulfate (aq).
c. If 2.16 g of iron (III) phosphate are obtained when a student performed this reaction, what is the percent yield?
d. Is the answer from part C reasonable? Assuming no calculation errors were made, give a possible explanation for the answer in part C.
e. If you perform this reaction with 20.00 mL of the 0.250 M solution of iron (III) sulfate and obtain a 65.0% yield, how many grams of iron (III) phosphate will you make?
In: Chemistry
Suppose you add a solution of calcium hydroxide to a solution of sodium carbonate and a precipitate forms. You measure the total amount of the precipitate (in g) as a function of time. At time 0, 20.0 s, 40.0 s and 60.0 s you get a cumulative weight of 0.00 g, 4.82 g, 6.33 g and 8.49 g of the precipitate, respectively. What is the average rate of reaction between 40 and 60 seconds in mol/s? Enter a numerical value below without any units or symbols. If you use scientific notation, then be sure to format it using the "E" notation like "1.0E-5" and do not put spaces between the "E" and the numbers.
In: Chemistry