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		</table><h1 style="margin-bottom:10px;padding-top:5px;" align="left">Kemikalier</h1><div style="clear:both;"><img src="https://old.frits.dk/img/pixel.gif" width="378" height="1" ></div><p><img align="right" style="float: right;" src="../img/tips/chemicals.jpg" alt="" width="100" height="100" /></p>
<h2>Salpetersyre</h2>
<p>Salpetersyre i enkelte Tilf&aelig;lde i koncentreret Tilstand, men oftere 	  fortyndet med samme Rumfang Vand. Denne Syre (betegnet 1:1), som har V&aelig;gtfylden 	  1,25, opl&oslash;ser adskillige Metaller, s&aring;ledes S&oslash;lv Kobber, 	  Nikkel, Bly og Kviks&oslash;lv men ikke Tin, som Syren ilter til uopl&oslash;selig 	  Tinsyre. Guld og Platin angribes ikke af Salpetersyre, men opl&oslash;ses af 	  Kongevand, der er en Blanding af 1 Del Salpetersyre og 2 til 4 Dele Saltsyre.</p>
<h2>Saltsyre</h2>
<p>Saltsyre virker Opl&oslash;sende, p&aring; flere Metaller, f.eks. Tin og Aluminium 	samt, hvad der i denne Forbindelse har s&aelig;rlig Interesse, Zink, hvorfor 	denne Syre ofte bruges til al fjerne Zinken fra en Blanding af udf&aelig;ldet, 	findelt, &aelig;delt Metal og Zinkpulver.</p>
<h2>Svovlsyre</h2>
<p>Svovlsyre i koncentreret Tilstand opl&oslash;ser S&oslash;lv og mange u&aelig;dle Metaller. Fortyndet Svovlsyre fjerner u&aelig;dle Metalilter bl.a. Kobberoksyd - fra Overfladen af udgl&oslash;det Metallegering og anvendes derfor som et  vigtigt Bejdsemiddel.</p>
<h2>Borsyre</h2>
<p>Borsyre, som er i Form af hvide Krystalblade,      kendes let p&aring;, at den ved at gnides mellem Fingrene giver en fedtet     Fornemmelse p&aring; Huden. Denne Syre fordamper f&oslash;rst ved meget     h&oslash;j Varmegrad og har deri Evne i Gl&oslash;dhede at uddrive mange      andre Syrer af disses Salte. Genstande, der er overstr&oslash;gne med    	Borsyre, bevarer deres Overfladeglans selv ved Gl&oslash;dning eller Lodning.</p>
<h2>Boraks</h2>
<p>Boraks, Borsyrens Natriumsalt (borsurt Natron, Natriumborat) har i smeltet   Tilstand en st&aelig;rk, opl&oslash;sende Virkning p&aring; de fleste u&aelig;dle   Metallers Iltforbindelser, hvorfor Boraks er et meget vigtigt Hj&aelig;lpemiddel   ved mange Slags Slaglodninger, idet det smeltede Salt holder Loddestedernes   Metaloverflader rene og blanke.<br /> Ved Smeltninger af &aelig;delt, legeret Metal i Grafit- eller Sten- bruges   Boraks i udstrakt Grad som beskyttende D&aelig;kke af Metaloverfladen.</p>
<h2>Soda</h2>
<p><span style="font-size: 8.5pt; line-height: 115%; font-family: Tahoma, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Soda eller natriumkarbonat er saltet efter kulsyres reaktion med natrium, og har den kemiske formel&nbsp;</span><span style="font-size: 8.5pt; line-height: 115%; font-family: Tahoma, sans-serif; color: #252525; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Na<sub>2</sub>CO<sub>3</sub></span></p>
<p class="MsoNormal"><span style="font-size: 8.5pt; line-height: 115%; font-family: Tahoma, sans-serif; color: #252525; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Den almindelige soda forhandles som&nbsp;</span><em style="font-size: 11.2px;">krystalsoda</em><span style="font-size: 11.2px;">, et produkt, hvor sodaen fremtr&aelig;der som klare krystaller. Desuden s&aelig;lges soda ofte som&nbsp;</span><em style="font-size: 11.2px;">kalcineret Soda</em><span style="font-size: 11.2px;">. Kalcineret Soda er 3 gange st&aelig;rkere end almindelig soda. Det dannes ved opvarmning af&nbsp;</span><span style="font-size: 8.5pt; line-height: 115%; font-family: Tahoma, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">natron</span></span><span style="font-size: 8.5pt; line-height: 115%; font-family: Tahoma, sans-serif; color: #252525; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">&nbsp;hvorved der fraspaltes vand og kuldioxid:</span></p>
<p class="MsoNormal"><span style="font-size: 8.5pt; line-height: 115%; font-family: "> <span style="background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">2 NaHCO<sub>3</sub>&nbsp;</span></span><span style="font-size: 8.5pt; line-height: 115%; font-family: Arial, sans-serif; color: #252525; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">&rarr;<span style="font-size: 8.5pt; line-height: 115%; font-family: Tahoma, sans-serif; color: #252525; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"> Na</span><sub>2</sub>CO<sub>3</sub>&nbsp;+ H<sub>2</sub>O + CO<sub>2<br /> </sub>Carbonationen CO<sub>3</sub><sup>2-</sup>&nbsp;er en middelst&aelig;rk&nbsp;</span><span style="font-size: 8.5pt; line-height: 115%; font-family: Tahoma, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">base</span></span><span style="font-size: 8.5pt; line-height: 115%; font-family: Tahoma, sans-serif; color: #252525; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">&nbsp;med en dissociationskonstant p&aring; pK<sub>2</sub>=10.34.</span><span style="font-size: 8.5pt; line-height: 115%; font-family: "><br /> <span style="background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Soda m&aring; ikke forveksles med&nbsp;<em>kaustisk soda</em>&nbsp;(</span></span><span style="font-size: 8.5pt; line-height: 115%; font-family: Tahoma, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">natriumhydroxid</span></span><span style="font-size: 8.5pt; line-height: 115%; font-family: Tahoma, sans-serif; color: #252525; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">), som er en st&aelig;rkt &aelig;tsende&nbsp;</span><span style="font-size: 8.5pt; line-height: 115%; font-family: Tahoma, sans-serif; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><span style="background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">base</span></span><span style="font-size: 8.5pt; line-height: 115%; font-family: Tahoma, sans-serif; color: #252525; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">.</span></p>
<p class="MsoNormal"><span style="font-size: 8.5pt; line-height: 115%; font-family: Tahoma, sans-serif; color: #252525; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;">Kilde:Wikipedia</span></p>
<h2>Salpeter</h2>
<p>Salpeter (salpetersurt Kali, Kaliumnitrat) bruges som Tils&aelig;tning ved Flussmeltning af urent Affald (f.eks. Filling).</p>
<h2>Salmiak&nbsp;</h2>
<p>Salmiak (Klorammonium, Ammoniumklorid) er F&aelig;ldningsmiddel for Platin i Opl&oslash;sninger og benyttes ogs&aring; ved Lodningsarbejde.</p>
<h2>Cyankalium</h2>
<p>Cyankalium (Kaliumcyanid), der bl.a. kommer     	  i Anvendelse ved Fors&oslash;lvning og Forgyldning, er en af de farligste     	  Gifte - d&oslash;delig Dosis er 0,05 g - som man ikke alene m&aring; undg&aring; at     	  faa i Munden eller i Blodet, men som man heller ikke uden Fare kan lugte     	  til: Dampene er nemlig den farlige Cyanbrinte (Bl&aring;syre), som Cyankaliet     	  giver fra sig, s&aring; snart en anden Syre kommer i Ber&oslash;ring dermed,     	  og man kan vanskeligt undg&aring;, at en s&aring;dan Syre optr&aelig;der     	  idet den atmosf&aelig;riske Luft indeholder Kulsyre, og den Luft, vi udaander,     	  er endnu mere kulsyrerig Hvis man lader Ud&aring;ndingsluft slippe ned     	  i et Glas med Cyankaliumst&aelig;nger, vil der straks udstr&oslash;mme     	  en Bl&aring;syreos fra Glasset, og ind&aring;nder man blot en ganske ringe     	  Del deraf, kan man faa et yderst heftigt Ildebefindende (Besvimelse er     	  en mild F&oslash;lge), og der skal slet ikke s&aring; meget til, f&oslash;rend     	  der er Livsfare til Stede. Alts&aring;: ingen Nysgerrighed med Hensyn    	  til Bl&aring;syrens Lugt, og god Ventilation af Rummet, hvori der arbejdes.</p>
<h2>Kogsalt</h2>
<p>Kogsalt (Natriumklorid) har forskellige Anvendelser, f.eks. som F&aelig;ldningsmiddel for S&oslash;lv og som Tils&aelig;tning til visse Flussmeltninger.</p>
<h2>Pimpstenspulver, Trippelse, Wienerkalk</h2>
<p>Pimpstenspulver, Trippelse, Wienerkalk, samt     	  naturlig og kunstig <strong>Blodsten</strong> (Pariserr&oslash;dt) er Slibe- og    	  Poleremidler.</p><div style="clear:both;"><img src="https://old.frits.dk/img/pixel.gif" width="378" height="1" ></div>
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