On heating, if the white powder is sugar, it will melt down to a light brown liquid form. Salt, on the other hand, will not melt. (ii) Salt is a better conductor of electricity: The white powder is …

A number of factors have an effect on the degree of solubility of a powder in water. Temperature, the pH level, humidity, the size and structure of the molecules that make up the powder, and …

You add a fine powder to a solvent (often these are food powders and the solvent is water) expecting it to dissolve - yet instead you get lumps that take forever to dissolve. What's going on, and how to fix it?

A number of factors have an effect on the degree of solubility of a powder in water. Temperature, the pH level, humidity, the size and structure of the molecules that make up the powder, and the polarity are all important considerations when it comes to insoluble powders.

One example of a white powdery substance that does not dissolve in water is talcum powder, which is commonly used in cosmetic products and baby powder.

As you boil away the water, these dissolved calcium/magnesium carbonates remain behind and their concentrations eventually become greater than their respective solubility limits. At this point they begin to precipitate out …

When a white powder is dissolved in a glass of water and you let it settle, the behavior of the mixture will depend on whether it forms a solution, suspension, or colloid. If the powder fully dissolves, as sugar does in water, the result is a true solution, which is a homogeneous mixture.

Magnesium ribbon burns with dazzling white light once treated to its ignition temperature. The white powder formed is Magnesium oxide which dissolves in water to give a basic solution which turns red litmus blue. Thus x is Mg and y is MgO.2MgO+O2 → 2MgOMgO+H2O → MgOH2.

Magnesium ribbon burns with dazzling white light once treated to its ignition temperature. The white powder formed is Magnesium oxide which dissolves in water to give a basic solution …

When a white powder is dissolved in a glass of water and you let it settle, the behavior of the mixture will depend on whether it forms a solution, suspension, or colloid. If the …

As you boil away the water, these dissolved calcium/magnesium carbonates remain behind and their concentrations eventually become greater than their respective solubility limits. At this point they begin to precipitate out of the …

A student following the procedure described in this module used water as the solvent and encountered some interesting problems. Comment on the effect if any. The unknown, a white …

Calcium sulfate and cornstarch are not soluble in 10% HCl. The rest of the powders are soluble. Test solubility similarly to how you tested water solubility. Bicarbonates and carbonates react with acid to form carbon dioxide bubbles. Solubility in Vinegar (dilute acetic acid)

A student following the procedure described in this module used water as the solvent and encountered some interesting problems. Comment on the effect if any. The unknown, a white powder, failed to dissolve in the solvent

On heating, if the white powder is sugar, it will melt down to a light brown liquid form. Salt, on the other hand, will not melt. (ii) Salt is a better conductor of electricity: The white powder is dissolved in water and conduction of electricity is checked.

One example of a white powdery substance that does not dissolve in water is talcum powder, which is commonly used in cosmetic products and baby powder.

Does it dissolve in the water at all? If both the sample and the water are at room temperature, did the temperature change when mixed together? Test the pH with pH paper or a meter.