ix grammar and make it clearer

The data in each treatment suggest that at 1.5M H2SO4, there was greater capacity to generate hydrogen gas as the range of the average volume difference of 28mL compared to 0.1M H2SO4. The overall graph shows linear trend of positive correlation fitting the hypothesis of increasement of rate of reaction with increased concentration.
The large percentage uncertainty in high concentration may suggest that low precision or variation caused by nature factors have occurred in a sample of data.

The data from each treatment indicates that at a concentration of 1.5M H2SO4, there was a higher capacity to produce hydrogen gas compared to 0.1M H2SO4. This is evident from the average volume difference of 28mL compared to the lower concentration. The overall graph shows a positive linear trend, supporting the hypothesis that the reaction rate increases with higher concentration.

However, the large percentage uncertainty observed in high concentrations may indicate that there is low precision or variation in the data caused by external factors.

To improve the grammar and clarity of the statement:

The data from each treatment indicates that at a concentration of 1.5M H2SO4, there was a greater capacity to generate hydrogen gas compared to 0.1M H2SO4. This is supported by the range of the average volume difference, which was 28mL. The overall graph shows a linear trend of positive correlation, aligning with the hypothesis of an increased reaction rate with higher concentration.

The presence of a large percentage uncertainty in the high concentration data may suggest that there were low precision or variations caused by external factors within the sample.