Thiosulphate solution

be avoided due to the risk of residual levels after preparation e.g. chloroform and dichloromethane . • Ethanol can be used as alternative as it is less toxic. • Water based systems are preferred. • Surfactants are used to create carrier drug solutions but as they can reduce glass transition temperature, so care must be taken in to consideration. ADVANTAGES OF SOLID DISPERSION(22): Particles with Reduced Particle Size: Molecular dispersions, as solid dispersions, represent the last state on particle

What are two possible sources of error for this experiment? Discuss how these errors would have changed your results. Specifically, how would the ratio of moles of anhydride to moles of water have changed? One possible source of error for this experiment is if the anhydride had been exposed to air before measuring because it could have reabsorbed some water vapor in the air. This would cause the ratio of moles of anhydride to moles of water change because there would be less water calculated depending

Summary Students will observe the dissolving of the sugar coating from an M&M when it is placed in water. Students will then help design an experiment to see if the type of liquid the M&M is placed in affects how much of the coating dissolves. Objective Students will be able to explain, on the molecular level, how the polar characteristic of water and sugar interact so that water dissolves sugar. Students will be able to identify and control the variables in their experiment. Students will also

Osmosis is the transfer of water molecules from places where there is a lot of water molecules to places there are not many water molecules. When the cell is selectively permeable it allows certain substances in and out of the cell. There are three terms for the amount of solute in a cell isotonic, hypotonic, and hypertonic. Isotonic means there is a balance of solute inside and outside of the cell. Hypotonic is when there is lower concentration of solute in the cell than the concentration outside

The purpose of this lab is to measure densities and understand how it can be used to identify unknown substances. Density is determined by a substance mass divided by its volume. It's possible to identify a substance by its density because density is an intensive property that does not change with the size of the substance.Density is also an intensive property , which depends on the type of matter not the amount. Density is also a qualitative observation which is descriptive info about a substance

The aim of this experiment was to observe the effect different concentrations of Dettol had on the growth of S. albus. The highest concentration of Dettol (100% - D) was predicted to be the most effective solution to kill and stop the growth of this particular bacteria. This can be justified as S. albus is gram-positive; easier bacteria to kill, developing resistance slower than a gram-negative. Therefore, the highest concentration of antibiotic should be – and was – the most successful in changing

The purpose of this experiment was to test the effects of various solute concentrations on rate of osmosis in dialysis bags. The hypothesis was that the rate of osmosis would increase as solute concentration increase. Bag 1 was the only isotonic bag, due to the water flowing evenly inside and outside of the bag. Bags 2-4 were hypotonic and were exposed to a hypotonic environment causing the water to flow inside the bag, where there were more solutes. The water moved inside the bag to try to balance

My question is “Will water freeze slower or faster with the addition of sugar.” I hypothesize that water will freeze slower with the addition of sugar than water without the addition of sugar. Here are the reasons why I hypothesize this and how I will determine whether or not my hypothesis was correct. Reason number one; adding a substance such as sugar to water or ice brings down the freezing point temperature and raises the melting point temperature of the existing ice. Sugar brings down the freezing

solute concentrated environment through a semipermeable membrane. The solute is the substance that dissolves in water, such as sugar, or salt (Dalton, 2016). The total concentration of solute in a solution is described as tonicity. According to Khan Academy, there are 3 kinds of tonicity that solution a solution can have (Osmosis and Tonicity, 2016). The first one is isotonic, which is when the extracellular fluid has the same solute concentration as the cell, and thus there will be no net move of water

samples immersed in sucrose solutions of different concentrations for 24 hours? The concentrations of sucrose solution are 0.0mol 〖dm〗^(-3), 0.2mol 〖dm〗^(-3), 0.4mol 〖dm〗^(-3), 0.6mol 〖dm〗^(-3), 0.8mol 〖dm〗^(-3), and 1.0 mol 〖dm〗^(-3). Hypothesis: When plant tissues are immersed in sucrose solutions of different concentration, the cells will gain or lose water by osmosis and therefore change in size and mass. If the potato samples are immersed with hypertonic solution, the mass of samples will be