The penultimate stage on the way to obtaining a noble metal from radio components is the restoration of the latter from the corresponding chloride. Iron (II) sulfate is excellent for these purposes. Consider the equation of this reaction: HAuCl4 - hydrogen tetrachloroaurate (III) - a compound that is formed when gold is dissolved in aqua regia.

The penetrating lubricant, which will be discussed, at times surpasses the most common tool WD-40, which everyone loves to use when unscrewing old, rusted bolts and nuts. Very often, when trying to unscrew a rusted threaded connection, we fail and the bolt breaks. This is not so bad if it is freely accessible and easy to replace.

Lying in the garage is an old jack that you have not been using for a long time? Do not just throw it in scrap metal, as some short-sighted car owners do. From the old jack you get a cool home-made pipe bender, which is useful in a private house or in the country. With this tool, you can bend the most common steel pipes that are used at home: inch, ½ inch and three quarters.

Now we have a master class in which we will learn how to make a practical, soft box for children's photos. We take the following for the master class: • Dense binding cardboard: two rectangles 16.5 * 11.5 cm and one 16.5 * 5.5 cm; • Sintepon; • Marine cotton in two colors, in white and navy blue; • Scrapbooking paper with a marine motif; • Napkin dark blue from the cutting; • Bunny cut down blue; • Blue cotton lace 3 cm wide; • Wooden chipboard with the inscription "Our son" or "Mother's treasures"; • Tape blue with pompons; • Double-sided tape; • Brads of blue color; • Suspension metal steering wheel; • Watercolor paper sheet 32 ​​* 37 cm; • Glue stick; • Ruler and elastic; • Patterned hole punch; • Ink pad; • Ribbon rep with anchors; • Scissors and pencil.

In planning the lighting of a bedroom, hallway or living room, wall lights play no less role than a classic chandelier or built-in lighting on the ceiling. If ordinary wall lights that are sold in stores seem very boring and inconspicuous to you, then you can make them yourself.

Delicate violets for true connoisseurs of indoor plants. Lovers of flowering flora and all kinds of miniature plants, as well as neat compositions from natural material, will not only be glad at the sight of this flower, but will admire these plants for a long time to come. Not only does it look beautiful, it does not require absolutely any maintenance!

In order to decorate the room and have a good time, you can make a floral panel using the origami technique of paper. Origami gladiolus bushes turn out to be very beautiful and go well with digitalis bushes. For their manufacture, we need from five to seven days, and the instructions for manufacture can be understood by children from seven or eight years.

Using the simple marbling technique described here, your cups can take on new appeal and become the focus of your friends and guests. And we will show how everyone can do this with their own hands. You will need: • a cup; • a roll of paper towels; • nail polish; • nail polish remover; • a spoon; • a container (for example, a plastic disposable plate); • water; • a glass.

It is annoying to pay expensive builder services that you can do on your own. We offer a master class on the manufacture of floor screed with the help of a coarse Strong leveler. This material has advantages over cement-sand mortar, which was used before the appearance of more modern, practical and economical compositions.

A dirty oven is a huge problem for any housewife. To restore its former cleanliness, it takes considerable effort and time, but not everyone knows that it is not necessary to use special detergents for this. Ordinary baking soda and vinegar can do this very well.

Today, two main methods are used to decorate wooden surfaces - this is burning with a soldering iron and engraving. However, not everyone has a tool to carry out such work. Therefore, we offer you an alternative and simpler way, how to "burn out" a picture or make an inscription on a tree at home.

This simple device is useful not only in the workshop, it will be useful in a normal garage - for example, if you have only one hydraulic jack available, but you need to lift and fix the machine from two sides. In addition, this invention, due to its design, also acts as additional insurance (this is especially true if you have an old jack).