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nmentitakecovo entACTIviy doriocato [References] Use the References to access important values if needed for this question. Write the net ionic equation for the acid-base hydrolysis equilibrium that is established when calcium hypochlorite is dissolved in water. + H20(4) This solution is

Our stomachs contain a solution of roughly 0.03 M HCl, which helps us digest the food we eat. The burning sensation associated with heartburn is a result of the acid of the stomach leaking through the muscular valve at the top of the stomach into the lower reaches of the esophagus. The lining of the esophagus is not protected from the corrosive effects of stomach acid the way the lining of the stomach is, and the results can be very painful. When we have heartburn, it feels better if we reduce the excess acid in the esophagus by taking an antacid. As you may have guessed, antacids are bases. One of the most common antacids is calcium carbonate, CaCO3. Read 7.2. Classifying Chemical Reactions, Acid-Base Reactions, and write the chemistry reaction between HCl and CaCO3

2. Aspirin is absorbed into the blood through the cells lining the stomach and the small intestine. Absorption requires passage through the plasma membrane, the rate of which is determined by the polarity of the molecule: charged and extremely polar molecules pass slowly, whereas neutral and hydrophobic ones pass rapidly a. The pH inside the stomach is around 2.0 and the pH of the contents of the small intestine is about 6.0. Which of the following statements is correct: i. The small intestine has 3 times lower [H] than the stomach. ii. The small intestine has 4 times lower [H ] than the stomach iii. The small intestine has 3,000 times lower [H] than the stomach iv. The small intestine has 10,000 times lower [H] than the stomach. b. The pKa of aspirin is 3.5. Draw the predominant form of aspirin and its overall charge (-1,0 or +1) when it is in the stomach or in the small intestine: Small Intestine (pH= 6.0): Stomach (pH 2.0) Overall Charge: Overall Charge:

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8) What is the most accurate way to see acidity or alkalinity? a. blue litmus paper b. red litmus paper c. universal litmus paper

Calculate the acid - neutralizing capacity of an antacid if a 0.4500 gram sample resulted in 0.00150 moles of reacted HCI

4g of Sodium hydroxide pellets NaOH are dissolved in water to prepare 200 ml of solution (S.). From solution 1.1- List the materials required to prepare solution (So). 1.2- Write the equation of ionization of NaOH in water. 1.3- Calculate the volume of solution S, required to prepare V1 = 0.1L of solution(S). 1.4- Determine the molar concentration of (S.). Deduce that of (S1). 1.5- Calculate the pH of solution (So) and that of solution (S1). M (NaOH) = 40 gxmol1. %3D wwwm

when chlorine gas is added to water during the disinfection of drinking water, it hydrolyzes with the water to form HOCL. The disinfection power of the acid HOCL is 88 times better than its conjugate base, OCl-. The pKa for HOCl is 7.5. (a) what percentage of the total disinfection power exists in the acid form at pH of 6?

1) Calculate the pOH of a 0.004839 M solution of Hplus.

O Settings D YouTube YouTube Maps Maps 9 News 9 News Forums Power Tra... RCFE Certification P... RCFE Administrator... Question 9 of 36 Complete the balanced neutralization equation for the reaction below: HCI(aq) + Sr(OH):(aq) → 4- 3- 12- 12+ 3+ 4+ 1 2 3 4 7 8. 9. 19 Do 1 12 13 4 15 6. 7. 8 (s) (1) (g) (aq) Sr H. CI Reset • x H2O Delete Show all IMG-4391.jpg IMG-4390.jpg 8:07 F N hulu Type here to search 11/5/20 Home End PgUp PgDn DII PrtScn F6 F7 F8 F9 F10 F3 F4 F5 LO

H3PO4 is another polyprotic acid with three acidic hydrogens.  Write a complete balanced equation for the three-step neutralization reaction between H3PO4 and NaOH.  Net reaction:  3NaOH + H3PO4 === Na3PO4 + 3H2O   1. H3PO4 + NaOH → NaH2PO4 + H2O 2. H3PO4 + 2 NaOH → Na2HPO4 + 2 H2O 3. H3PO4 + 3 NaOH → Na3PO4 + 3 H2O     Sketch an approximate graph of pH vs. volume on the following page, explaining why you choose to draw it this way.

Which statement regarding sulphuric acid is incorrect?   a. Concentrated sulfuric acid is about 78% H2SO4 by mass and 10 molar b. It is a strong acid with respect to its first step ionisation c. Its second step ionization is not complete in concentrated solutions d. It is often used as a dehydrating agent because of its strong affinity for H2O

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1. Nitrogen in an industrial wastewater is primarily in the form of ammonia (NH3) and ammonium (NH4+) ions. The acid/base equilibrium reaction for ammonia and ammonium is given as: NH4+ → H+ + NH3 Ką = 10-9.26 The total nitrogen concentration in wastewater is given as 2 x 10-3 moles/L (or 28 mg N/L), a. Calculate the concentration of ammonia (NH3) and ammonium (NH4*) ions at pH 10. NH3: moles/L NH4*: moles/L Check b. In ammonia stripping, nitrogen is removed from wastewater by volatilization of NH3. Would ammonia stripping be more effective above or below pH 9? Briefly explain your reasoning.

FOLLOW-UP QUESTIONS 1. A certain soft drink was analyzed and found to contain 0.080MH. Other ingredients of the drink include sugar or, in the diet form of the drink, an artificial sweetener. What property of this acid solution is overcome by using sugar or sweetener? 2. Every day, a manufacturing plant produces 5.0 x 103 L of NaOH waste of molarity 0.030 M. In order to comply with environmental regulations, this NaOH must be neutralized before being discharged as effluent. What mass of concentrated HCl will be required to neutralize it? ([HCI] = 12M; density = 1.2 kg/L) 4. Why would it be difficult to measure e concentration of acid in red wine or in a cola-type drink using the method in Part V? How could you overcome this difficulty? 5. There are some titrations in which the endpoint is obtained by measuring the electrical conductivity of the solution and watching for the point at which the conductivity is at a minimum. Such a titration is called an electrometric titration. An…

What is the hydronium ion concentration of a solution at 25C with a pOH of 4.7?

Which is the net ionic equation that takes place when HClO3 (aq) is added to KOH(aq)? A) HClO3(aq) + KOH(aq) -> KClO3(aq) + H2O(l) B)H+ (aq) + KOH(aq) -> K+ (aq) + H2O(l) C)H+ (aq) + OH- (aq) -> H2O(l) D)HClO3 (aq) + OH-(aq) -> ClO3 (aq) + H2O (l) E) HClO3(aq) + K+ (aq) -> KClO3(aq) + H+ (aq)

The hydronium ion concentration is 1x10(-5). What is the [H+] concentration?