Bases in water

The substances, thus formed, are bases, and form salts with acids, which dissolve in water with a yellow colour. The solubility of the hydrochloride of the nitroso-bases in water distinguish them from the nitrosamines of the secondary bases which are insoluble. ... [Pg.280]

Bases, like acids, are classified as strong or weak. A strong base in water solution is completely ionized to OH- ions and cations. As you can see from Table 4.1, the strong bases are the hydroxides of the Group 1 and Group 2 metals. These are typical ionic solids, completely ionized both in the solid state and in water solution. The equations written to represent the processes by which NaOH and Ca(OH)2 dissolve in water are... [Pg.82]

As pointed out in Section 13.5, anions that are the conjugate bases of weak acids act themselves as weak bases in water They accept a proton from a water molecule, leaving an Oil ion that makes the solution basic. The reactions of the fluoride and carbonate ions are typical ... [Pg.372]

A 0.143 Af solution of the weak base RNH2haspH 9.11 at25°C. What is AG° for the dissociation of the weak base in water ... [Pg.476]

The NH3 molecule acts as a Brensted-Lowry base in water, accepting a proton from a water molecule ... [Pg.560]

The indicator solution is a 1 per cent solution of the base in water. [Pg.321]

APPENDIX 7b ACIDIC DISSOCIATION CONSTANTS OF SOME BASES IN WATER AT... [Pg.833]

Diphenylcarbazide as adsorption indicator, 358 as colorimetric reagent, 687 Diphenylthiocarbazone see Dithizone Direct reading emission spectrometer 775 Dispensers (liquid) 84 Displacement titrations 278 borate ion with a strong acid, 278 carbonate ion with a strong acid, 278 choice of indicators for, 279, 280 Dissociation (ionisation) constant 23, 31 calculations involving, 34 D. of for a complex ion, (v) 602 for an indicator, (s) 718 of polyprotic acids, 33 values for acids and bases in water, (T) 832 true or thermodynamic, 23 Distribution coefficient 162, 195 and per cent extraction, 165 Distribution ratio 162 Dithiol 693, 695, 697 Dithizone 171, 178... [Pg.861]

APPENDIX 4 SATURATED SOLUTIONS OF SOME REAGENTS AT 20°C 829 APPENDIX 5 SOURCES OF ANALYSED SAMPLES 830 APPENDIX 6 BUFFER SOLUTIONS AND SECONDARY pH STANDARDS 830 APPENDIX 7a DISSOCIATION CONSTANTS OF SOME ACIDS IN WATER AT 25°C 832 APPENDIX 7b ACIDIC DISSOCIATION CONSTANTS OF SOME BASES IN WATER AT 25°C 833... [Pg.899]

Self-Test J.lA Which of the following compounds are Bronsted acids or bases in water (a) HN03 (b) QH (c) KOH (d) C H5COOH. [Pg.98]

TABLE i.l The Strong Acids and Bases in Water Strong acids Strong bases... [Pg.99]

Hydroxide ions, such as those provided by sodium hydroxide and calcium hydroxide, are also strong bases in water ... [Pg.99]

The reaction between an acid and a base is called a neutralization reaction, and the ionic compound produced in the reaction is called a salt. The general form of a neutralization reaction of a strong acid and a metal hydroxide that provides the hydroxide ion, a strong base, in water is... [Pg.99]

The net outcome of any neutralization reaction between a strong acid and a strong base in water is the formation of water from hydrogen ions and hydroxide ions. [Pg.100]

We can also write an equilibrium constant for the proton transfer equilibrium of a base in water. For aqueous ammonia, for instance,... [Pg.527]

Decide which member of each of the following pairs is the stronger acid or base in water (a) acid HF or HIO, (b) base NOz or CN. ... [Pg.530]

All anions that are the conjugate bases of weak acids produce basic solutions. For example, formic acid, HCOOH, the acid in ant venom, is a weak acid, and so the formate ion acts as a base in water ... [Pg.541]

Acetate ions and the other ions listed in last row of Table 10.8 act as bases in water. [Pg.541]

When a drop of strong acid is added to water, the pH changes significantly. However, when the same amount is added to a buffer, the pH hardly changes at all. To understand why not, consider the dynamic equilibrium between a weak acid and its conjugate base in water ... [Pg.566]

Ammonia is very soluble in water because the NH3 molecules can form hydrogen bonds to H20 molecules. Ammonia is a weak Bronsted base in water it is also a reasonably strong Lewis base, particularly toward d-block elements. For example, it reacts with Cu2+(aq) ions to give a deep-blue complex (Fig. 15.4) ... [Pg.746]

Explain the observations that NH, is a weak Bi. base in water whereas NF shows no signs of basic... [Pg.771]

In contrast to oxoesters, the a-protons of thioesters are sufficiently acidic to permit continuous racemization of the substrate by base-catalyzed deprotonation at the a-carbon. Drueckhammer et al. first demonstrated the feasibility of this approach by performing DKR of a propionate thioester bearing a phenylthiogroup, which also contributes to the acidity of the a-proton (Figure 4.14) [39a]. The enzymatic hydrolysis of the thioester was coupled with a racemization catalyzed by trioctylamine. Owing to the insolubility of the substrate and base in water, they employed a biphasic system (toluene/H2O). Using P. cepacia (Amano PS-30) as the enzyme and a catalytic amount of trioctylamine, they obtained a quantitative yield of the corresponding... [Pg.99]

The whole range of carboxylic acids and alcohols can be reacted to form esters. They are found in a large number of natural and synthetic scents and perfumes because of their pleasant odor. Many are used as solvents for paints and resins. Esters are converted back into the original acids and alcohols hy reaction with strong bases in water in a process called saponification (soap formation). [Pg.67]

The breakdown of any acid or base in water to form its ions is a reversible reaction. Hydrochloric acid, for example, is a strong acid that dissociates completely to form hydrogen ions and chlorine ions ... [Pg.41]

These species are Bronsted-Lowry bases in water (none are Arrhenius bases) since they are proton acceptors and OH" ions are produced NH3, HS, CH3COO and O2. ... [Pg.148]

The metallic properties increase down any column and towards the left in any row on the periodic table. One important metallic property is that metal oxides are base anhydrides. A base anhydride will produce a base in water. These are not oxidation-reduction reactions. Many metal oxides are too insoluble for them to produce any significant amount of base. However, most metal oxides, even those that are not soluble in water, will behave as bases to acids. A few metal oxides, and their hydroxides, are amphoteric. Amphoteric means they may behave either as a base or as an acid. Amphoterism is important for aluminum, beryllium, and zinc. Complications occur whenever the oxidation number of the metal exceeds +4 as in the oxides that tend to be acidic. [Pg.284]

Andon, R.J.E., Counsell, J.F., Tees, E.B., Martin, J.F., and Mash, MJ. Thermodynamic properties of organic oxygen compounds. Part 17. Tow-temperature heat capacity and entropy of the cresols, Trans. Faraday Soc., 63 1115-1121,1967. Andon, R.J.E., Cox, J.D., and Herington, E.F.G. Phase relationships in the pyridine series. Part V. The thermodynamic properties of dilute solutions of pyridine bases in water at 25 °C and 40 °C, J. Chem. Soc. (London), pp. 3188-3196, 1954. Andrades, M.S., Sanchez-Martin, M.J., and Sanchez-Camazano, M. Significance of soil properties in the adsorption and mobility of the fungicide metalaxyl in vineyard soils, J. Agric. Food Chem., 49(5) 2363-2369, 2001. [Pg.1625]

As a consequence of the high stability of tyrosine 0-sulfate under alkaline conditions, no side effects are noted in treatments of sulfated tyrosine peptides with bases in water or in organic solvents as required for removal of base-labile protecting groups, e.g. Ac, 47,48 Msc, 49 or Fmoc.f42,50 149 ... [Pg.429]

Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...