Autocatalysis

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0> <table cellpadding=0 cellspacing=0 border=0 height="100%"><tr> <td valign="top" width=200 BGCOLOR="#003333" TEXT="#F7F7FF" background="03fd4c00dduajq.gif"> <div> <TABLE BORDER="0" CELLPADDING="2" CELLSPACING="0" WIDTH="95" BORDERCOLORLIGHT="#C0C0C0" BORDERCOLORDARK="#808080" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" > <tR> <tD VALIGN=TOP HEIGHT= 46 WIDTH="91"><IMG BORDER="0" SRC="1x1.gif" HEIGHT="46" ALIGN="bottom" WIDTH="91" HSPACE="0" VSPACE="0"></tD> </tR> </TABLE></div> <div> <A HREF="index.htm" TARGET="_top" TITLE="Science For All"><U>home</U></A>  </div> <div> <A HREF="site_map_and_site_search_engine.htm" TARGET="_top" TITLE="Science for all site map"><U>Site map + site search engine</U></A></div> <br> <div> <A HREF="id44.htm" TARGET="_top" TITLE="KS5 Switchboard"><U><IMG SRC="14a32320.gif" border=0 width="50" height="50" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></U></A> <A HREF="id44.htm" TARGET="_top" TITLE="KS5 Switchboard"><U>KS5 switchboard</U></A></div> <br> <div> <A HREF="enthalpy.htm" TARGET="_top" TITLE="Enthalpy "><U>Enthalpy </U></A></div> <div> <A HREF="id84.htm" TARGET="_top" TITLE="Half equations"><U>Half equations</U></A></div> <div> <B><IMG BORDER="0" SRC="Symb075c00b700c8ffffff00.gif" HEIGHT="13" WIDTH="24" ALIGN="bottom" HSPACE="0" VSPACE="0">Autocatalysis</B></div> <br> </td> <td valign="top" BGCOLOR="#FFFFFF" TEXT="#080000" bgproperties="fixed" background="05379803.gif"> <div> Autocatalysis</div> <br> <div> You are visiting the Science For All site</div> <br> <div> <IMG SRC="0613d050.gif" border=0 width="573" height="5" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></div> <br> <div> I use this sheet to illustrate the principle of autocatalysis to Y13s. You will need to adjust the time suggested for the marble chips experiment to suit the concentration of acid and size of chip. The volume of gas is collected in a gas syringe or measuring cylinder, as for the Y11 rates of reaction experiment. </div> <br> <div>  <a href="HTMLobj-520/Catalyst_practical.doc"><img align="bottom" border="0" width="55" height="22" alt="Autocatalysis worksheet" src="HTMLobj-520/pencil.GIF"> <u>Autocatalysis worksheet</u></a>  </div> </td> </tr></table></body>