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And pedant alert, you mean metal oxide, VO is a metallic oxide, Al2O3 isn't. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.
Featured on Meta. The copper sulfate solution drips through as a filtrate. This can be warmed to evaporate the water, leaving copper sulfate crystals behind. How can we make sodium chloride? The first part of the name is 'sodium', so we need a base containing sodium. We could use sodium hydroxide, which is soluble and so forms an alkaline solution. The second part of the name is 'chloride', so we need to use hydrochloric acid. Here are the equations for the reaction:. It can be difficult to add exactly the right amount of acid and alkali in a neutralisation reaction so that your salt solution is precisely pH 7.
Bases are usually:. Many bases are insoluble - they do not dissolve in water. However, if a base does dissolve in water, we also call it an alkali. The table shows two examples of bases:. Household cleaning products contain strong bases, such as sodium hydroxide solution. Like acids, their bottles are labelled with a symbol to warn that they may make your skin red or blistered unless you wash off any spills with plenty of water. Alkalis feel soapy when they get on your skin, so it is easy to tell when you have had an accident and must wash your hands.
Just like concentrated acids, concentrated alkalis are corrosive.
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