h) A way to make hard water softer is to put an sodium nitrate and create a precipitate to mellow out the reaction. Another way of making it softer is by removing the calcium ions one way of doing that is by boiling the solution to take out some of the ions. Conclusion: Overall, we determined that sodium carbonate, Na2CO3, is the anion that can be used to precipitate the most metal cations. Also, we learned that the anion sodium chloride, NaCl, could be used to remove silver ions from solutions. The stuff that I found interesting was that how many colours you can get when you mix the cations and anions
This product is pitched as an antiseptic mouth rinse that kills germs caused by gingivitis, plaque, and bad breath and this product is also approved by the American Dental Association. Active ingredients Eucalyptol 0.092%, Menthol 0.042%, Methyl salicylate 0.060%, and Thymol 0.064% these ingredients purpose anti-gingivitis / anti-plaque. Inactive ingredients water, alcohol 21.6%, sorbitol solution, flavor, poloxamer 407, benzoic acid, sodium benzoate, FD&C green no.3. In reviewing both products Equate Blue Mint mouth rinse and Listerine Cool Mint mouth rinse we have come to the conclusion thus far they both contain the exact same ingredients proportions and all. Not too much difference.
B: Ingestion of an acidifying drug in this case is to blame. With the introduction of Topamax to Mary’s system, the Topamax begins to inhibit her renal carbonic anhydrase causing metabolic acidosis. 9. B: IV of HCO3- in isotonic solution is the best option and my recommendation. Even with the carbonic anhydrase being inhibited and causing metabolic acidosis, direct injection
Computer Additivity of Heats of Reaction: Hess’s Law 18 (1) Solid sodium hydroxide dissolves in water to form an aqueous solution of ions. (2) Solid sodium hydroxide reacts with aqueous hydrochloric acid to form water and an aqueous solution of sodium chloride. NaOH(s) + H+(aq) ) + Cl–(aq) → H2O(l) + Na+(aq) + Cl–(aq) ∆H2 = ? OBJECTIVES • • • • In this experiment, you will Combine equations for two reactions to obtain the equation for a third reaction. Use a calorimeter to measure the temperature change in each of three reactions.
An aqueous solution of ammonium sulfate is allowed to react with an aqueous solution of lead(II) nitrate. Identify the solid in the balanced equation. A) (NH4 )2 SO4 B) Pb(NO3 )2 C) PbSO4 D) NH4 NO3 E) There is no solid formed when the two solutions are mixed. ____ 11. An aqueous solution of sodium carbonate is reacted with an aqueous solution of calcium chloride.
The chemical reaction used to find this constant is as follows: MgC2O4 (s) ↔Mg(aq)2++ C2O4 (aq)2- Kc= Mg2+[C2O42-][MgC2O4] Ksp=Mg2+[C2O42-] The solid salt magnesium oxalate is prepared through the following precipitation reaction: Mg(SO4)(aq)+NaC2O4 (aq) → MgC2O4 (s)+NaSO4 (aq) Next, the concentration of the Mg2+ and C2O42- ions is found through a redox titration. This redox titration uses a standardized potassium permanganate solution. The potassium permanganate solution is standardized by titrating it with samples of iron(II)ammonium sulfate hexahydrate . The end point is reached when the solution has turned light purple which is a result of excess amounts of MNO4-. This reaction can be summed up using the following formula: 5Fe2++8H++MnO4- →5Fe3++Mn2++4H2O After standardization, the potassium permanganate solution is then titrated with 3 different magnesium oxalate solutions.
I also observed that while filtering the benzoic acid-salt mixture that some of the mixture stuck to the sides of the filter and may not have been filtered properly. This may affect the mixture percentages as to that the separate substances may not be as pure as they should be. Calculations -Total Mixture Weight- 6.9 g -Total Mixture Weight based on weight of individual substances- 1.6 g (iron fillings) +1.7 g (sand) + 1.7 g (table salt) + 1.7 g (benzoic acid) = 6.7 g total -Amount of mixture lost during experimentation- 6.9 g – 6.7 g = 0.2 g -Percentage of Mixture- 1.6/ 6.7 = 23.8 % (iron fillings) 1.7/ 6.7 = 25.0% (sand) 1.7/ 6.7 = 25.0% (table salt) 1.7/ 6.7 = 25.0% (benzoic
For example, the reaction |BaCl2•2H2O ( BaCl2 + 2H2O |(2) | is reversible, and if water is added to the anhydrous salt BaCl2, formation of BaCl2•2H2O takes place: |BaCl2 + 2H2O ( BaCl2•2H2O |(3) | The reaction of dehydration of hydrated ferrous sulfate |FeSO4•7H2O ( FeSO4 + 7H2O |(4)
This solution was placed in a burette and 18.4 cm3 was required to neutralise 25 cm3 of 0.1 moldm-3 NaOH. Deduce the molecular formula of the acid and hence the value of n. 5. Sodium carbonate exists in hydrated form, Na2CO3.xH2O, in the solid state. 3.5 g of a sodium carbonate sample was dissolved in water and the volume made up to 250 cm3. 25.0 cm3 of this solution was titrated against 0.1 moldm-3 HCl and 24.5 cm3 of the acid were required.
EXP 2.13: MEASUREMENT OF THE CRITICAL MICELLE CONCENTRATIONOF A SURFACTANT ABSTRACT The aim of this experiment is to measure the critical micelle concentration of sodium dodecysulphate. This will be done by using the conductivity method which will involve measuring the conductivity of a solution during a titration. The second part of the experiment will involve using spectrophotometric method to determine the maximum wavelengths at different concentrations. INTRODUCTION in colloidal and surface chemistry the critical micelle concentration (CMC) of a surfactant is the concentration where micelles begin to form . Surfactants are compounds that contain hydrophobic and hydrophilic groups.