PAL Practice Exam 3

(Q11) lodic acid (HIO3) is a relatively strong weak acid (Ka = 0.17). What will be the equilibrium pH of a solution that has an initial concentration of 0.0122 M in iodic acid?

(Q13) The poison strychnine is a weak base with K, = 1.8 x 106. What will be the equilibrium pH %3D of a solution that is 0.710 M in strychnine?

(Q19) What is the pH of a solution that is 0.768 in hydrosulfuric acid (H2S)? Ka1 = 8.9 x 108 and Ka2 = 1 x 10-19.

I need all questions

1-  What is the p H of a 2.31 M solution of HA that has a K a of 1.81E-5?    Answer:     (2.19) 2-  Calculate the percentage that allows for the deliberation of whether or not 0.05 - [H+] ~ 0.05 in accordance with 5% rule. 0.05 M solution of HA with a K a = 7.70E-7   Answer to 2 decimal places (even though this might violate significant figure rules).   Answer:     (0.39)

Chemistry Morphine sulfate has a pKb of 4.5. How much of morphine will be available to enter the CNS from plasma (pH 7.4)? a. 0-1% b. 1-10% c. 10-50% d. 50-90% e. 99-100%

Hi please help me with my activity. ( 4.1, 4.2, 4.3 and 5). It's all about "TEST FOR GLUCOSE IN URINE". Don't need to perform just research and knowledge only please. I'm kinda busy with other Activity that's why I don't have time to answer. Thank you.

Q 106

(13) 14 15 $ 애 애 1. NaHCO3, H2O 2. H+ Br 애

7. Warfarin is a blood thinner known by its tradename Coumadin. Warfarin has a formula mass of 308.33 g/mol and a pka of 5.0. Sun et al (J. Pharm. Biomed. Anal. (2006) 42, 218-222) reported a plasma concentration of 567.6 ng/ml. (1.84 uM) warfarin in patients within one month of heart valve treatment. Blood pH is Z4. What percent of warfarin in the plasma is not deprotonated? The body has 5.0L of blood. но 22, warfarin

Qi) compuke pH value of the fol Howing solution: @ 50 ml of o.0ol M NaoH O 10 ml of o.2 M HCLO4 -5 © Igm of HOAC in 10oml, ka=li8#10 Ans.: (1, 0.7,3.26)

(Q17) What is the pH of a solution that is 0.596 M in sodium formate (NaCHO2)? The Ka of formic acid is 1.8 x 10-4.

Question 39 p 14,00 20.00 8.00 600 4.00 2.00 0.00 0.00 5.00 10.00 Graph 3 Calculate the K, for the conjugate base. (11.98,5.09) 15.00 20.00 volume of titrant, ml 25.00 30.00 35.00 (2442,8.68)

(Q12) Hydrazoic acid (HN3) is a weak acid with a Ką of 2.5 x 105. What will be the equilibrium pH of a solution that is initially 0.349 M in hydrazoic acid?

A 190.00 mL solution of 0.00300 M AB4 is added to a 340.00 mL solution of 0.00265 M CD5. What is pQsp for AD4?   Answer:     (11.251)

Methylamine, CH-NH₂, is a weak base (pk = 3.36). Which of the following acids is sufficiently strong to protonate methylamine to an extent greater than 50% at 25 C? (pk for each acid is given) H₂O (15.7) H₂S (7.04) CH₂CH₂-OH (-> CH3CH₂-O HIO (10.70) ) (15.9) Reminder: pk + pk = 14.00 (25°C) Select one: O A. H₂S only O B. HIO and H₂S O C. H₂O only O D. O E. HIO only H₂S and H₂O

Please answer 1,2,3

Simple alcohols (just containing C's, H's and an OH, where the H on the O is the acidic H) have a pKa similar to water (15.7) hydronium ion (-2)

A slightly soluble salt has the formula A B1 and a Ksp of 6.1E-25. What is pB in a solution of this salt?   Answer:     (12.11)

10 Worksheet B Chapter 1 18 FL 0Z POM (530 m) ZUI Given the following soubility curves, answer the following questions: D. 70 60 40- 30- S 20- 10- 0- 70 80 90 100 30 60 40 Temperature (°C) 10 20 50 In which of the two compounds can more solute be dissolved in the same amount of water when the temperature is increased? 1. 2. At what temperature is the solubility of both compounds the same? 12°C Describe the effect that an increase in temperature has on the solubility of the compound. 3. Consider Compound A. 2areassan temp more 68/1009. SOIUte is a. S100 inca can be dissolved in 42 grams of water at 40°C? 289 A student adds 48 g of the compound to 85 g of water at 90°C. Will it all dissolve? The solution is then cooled to 20°C. How much, if any, of the C. solute will crystallize out? 35* 100 4. Consider Compound B. a. A student tries to dissolve 35 g of the compound in 100 g of water at 40°C. Will it all dissolve? NO 28 35 100 400 (7) L. b. If not, how much will remain undissolved? What…

8) What is the pH of a solution containing 0.280 M weak base, B', with a K, of 3.9 X 107? (10.51) в (ад) + H-0 (1) ВН (аq) + ОН (ад)

1. (10.3- 1.24)/18.43 2. A penny minted after 1982 has a mass of 2.5 g Calculate total mass of three such pennies. 3. The following are placed in a beaker weighing 39.457 g: 2.689 g of NaCl, 1.26 g of sand and 5.0 g water. What is the final mass of the beaker? 4. If the beaker containing a sample of alcohol weighs 49.8767 g and the empty beaker weighs 49.214 g, what is the weight of the alcohol? 5. A flask that weighs 345.8 g is filled with 225 mL of carbon tetrachloride. The weight of the flask and carbon tetrachloride is found to be 703.55 g. From this information, calculate the density of carbon tetrachloride.

Oo.55. Subject  :- Chemistry

Ili 回85 2' 4 0O in 6 8. 7. 4. 3. $4 23 & IIO Moʻh +(9 CaF2(s) + + (6)!S CaSiO3(s) + If the coefficient equals 1, add "1" in the provided box. Write a balanced equation for the following by inserting the correct coefficients.

Dr. Pepper has an [H+] = 0.000014 M.  What is its pH? (4.85)

Determine the lime and soda ash does, in mg/L as CaO and Na2CO3, to soften the Thames River to a final hardness of less than 125 mg/L as CaCO3. Assume that all the alkalinity is bicarbonate and that the lime is 90% pure and the soda ash is 97% pure. (4.21)

O Chem101 Question 2 of 10 Balance the following chemical equation (if necessary): H:SO.(aq) + Pb(OH)«(s)Pb(SO.):(s) + H:O(1) 3. 4. 6. 7. 8. 6. (s) (1) (g) (aq) Pb(OH). H.O PbSO. H.SO. Reset x H.O Delete

9:27 ull 3G make quiz II pharmacy lab (Copy) (...hs 4. In a titration, a sample of H2SO4 solution having a volume of 15.00 mL required 36.42 mL of 0.147 M NAOH solution for complete neutralization. What is the molarity of the H2SO4 solution? (2.5 Points) 2 NaOH. +H2SO4(aq) * ----> Naz SO4 + 2H2 0.178 M H2S04 0.135 M H2S04 0.350 M H2S04 0.70 M H2SO4 Submit This content is created by the owner of the form. The data you submit will be sent to the form owner. Microsoft is not responsible for the privacy or security practices of its customers, including those of this form owner. Never give out your password. Powered by Microsoft Forms | Privacy and cookies | Terms of use 900 Activity Chat Teams Assignments Calendar More

Can't figure it out

Rank the given compounds in increasing order based on the melting point. (1 = lowest)

____GaF3  + ___Cs-->  ____CsF  + ____Ga     A. (2,2,3,1)   B. (1,3,2,1)   C. (1,3,3,1)   D. (2,3,1,3)   E. (1,2,3,1)

(Q16) What is the pH of a solution that is 0.889 M in ethylammonium chloride (CH3CH2NH3CI)? The Kb of ethylammonia (CH3CH2NH2) is 5.6 x 1o-4.

What is the solubility, in moles per liter, of PbCrO4 (Ksp = 2.0 x 10-14) in 0.015 M Na2CrO4 solution? (1) 5.1 × 10-8 (2) 9.4 x 10-6 Ⓒ(3) 1.33x10-12 (4) 1.1 x 10-5 O (5) no answer is correct

#5 Calculating thee % acetic acid in vinegar

10.109 A 0.204 M NaOH solution is used to titrate 50.0 mL of an H,PO, solution. (10.7) a. Write the balanced chemical equation. b. What is the molarity of the H;PO4 solution if 16.4 mL of the NaOH solution is required?