Goodbye privacy, hello 'Alexa': Amazon Echo, the home robot who hears it all. We had Rory Carroll invite âAlexaâ aka the Echo into his home. There was helpful cooking assistance, endless facts and figures, an amusing misunderstanding â and concerns over what exactly Amazon does with all that interaction data. Rory Carroll in Los Angeles.
Aqua regia or Royal water can dissolve metals. It is a mixture of conc.nitric acid and conc.hcl in the ratio of 1:3. Remember none of the above mentioned acids will dissolve the metals in the absence of other. adhi Â· 9 years ago.
Metal Out Plus. For Swimming Pools. Controls iron staining and scale formation. Dissolved metals and minerals (such as iron, calcium, manganese and magnesium) in pool water. and corrosion of metal pool fittings will often cause staining and/or scaling. Metal Out Plus is an. aqueous solution of hydroxyethylidene-diphosphonic acid (HEDP) that is best used for metallic.